IBIS - Ncdoj.gov
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1. is a computerized system for acquiring and storing the images of cartridge cases of questioned origin and those fired from known firearms IBIS captures digital images of the primer firing pin area of fired cartridge cases using state of the art optical and electronic technology These images are then stored in databases and sophisticated algorithms are used to correlate the images against each other using filters such as caliber rifling specifications date of crime and date of entry These correlations produce lists of possible associations with the highest scoring correlations at the top of the list The IBIS Technician and or Coordinator may then call up the images and compare side by side on a monitor If a possible association is confirmed the actual evidence items are compared by a Forensic Scientist on a comparison microscope for final determination When a possible association is made between an item of evidence in the current custody of the Laboratory and a case no longer in the custody of the Laboratory a report will be generated in FA for the associated cases which will notify the agency of the possible association see suggested report wording below All evidence will be returned to the submitting agency If the involved agency or agencies later need confirmation of the association it will be their responsibility to resubmit the evidence in all associated cases When a possible association is made between items of evidence currently2. Same as 38 Special 357 Sig 125 gr FMJ 40 S amp W 165 or 180 gr JHP 10mm 180 gr JHP or 200 gr FMJ 41 Magnum 210 gr LRN 210 gr JSP or 210 gr JHP 44 Magnum 44 Special 180 gr JHP 44 Special 180 gr JHP 44 Special 246 gr LRN 44 Special 246 gr LRN e 45 Auto 230 gr FMJ 5 1 5 2 1 Test fires are considered only as reference items in the Laboratory 5 1 5 3 Screen all questioned evidence cartridge cases to determine suitability for entry into IBIS If found suitable for entry according to the specifications herein questioned cartridge cases shall be entered into IBIS 5 1 5 3 1 Any evidence cartridge case selected for entry into IBIS shall have sufficient individual characteristics within the firing pin impression and or within the breechface marks on the primer to effect a match In addition an evidence cartridge case with an ejector mark having sufficient individual characteristics may be entered into IBIS Ejector mark image entry is currently limited to caliber 7 62 x 39mm cartridge cases 5 1 5 3 2 Any information about the identification of evidence cartridge cases to each other and the selection of certain specimens for entry into IBIS shall be noted in the case notes in Forensic Advantage FA If there are more than one matching evidence cartridge case suitable for entry into IBIS the Forensic Scientist shall select the one bearing the most or the clearest individual characteristics for entry or more th
3. 4 week period Specific backup details and procedures may be found in the IBIS Procedures Manual These backup procedures comply with the National Integrated Ballistic Information Network NIBIN and IBIS backup procedures 5 1 5 All Forensic Scientists shall have the following responsibilities with respect to IBIS 5 1 5 1 Know which calibers are acceptable for IBIS BRASSTRAX entry 25 Auto 223 Remington 5 56 NATO 32 9mm 7 62x39mm 380 357 Sig 40 10mm 44 45 5 1 5 1 1 Cartridge cases fired in revolvers and rimfire firearms and fired shotshells are not currently being entered into IBIS BRASSTRAX Specific cartridge case entries may be made for unique forensic circumstances or at the request of a court or a federal agency 5 1 5 2 Know the preferred ammunition for test firing known firearms for entry of test cartridge cases into IBIS e 25 Auto 50 gr FMJ Page 2 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager 7 62 x 39mm 123 gr FMJ 32 Auto 71 gr FMJ 32 S amp W 88 gr LRN 32 S amp W Long 98 gr LRN 380 Auto 95 gr FMJ 9mm Luger 115 or 124 gr FMJ 38 Special 158 gr LRN CCI 158 gr P MJSP or 130 gr FMJ 357 Magnum
4. yearly basis according to pages 7 through 11 of the NIST Standard Reference Material 2461 Certificate titled User Guide for NIST SRM 2461 Standard Cartridge Cases see Attachment A The correlation results of this entry shall be maintained in the employee s proficiency test file 5 4 4 Having obtained the NIST Standard Cartridge Case the cartridge case shall be entered into IBIS as the IBIS Benchmark Cartridge Case The entry shall be completed by all personnel authorized to use IBIS 5 4 5 Having entered the Benchmark cartridge case into IBIS the NIST Standard Cartridge Case shall be correlated against other BATFE IBIS sites 5 4 6 The correlation results shall then be evaluated to determine the success of the entry A successful proficiency test entry is one for which the previous year s QC entry appears in the top ten of the correlation result list An unsuccessful proficiency test shall be discussed with the IBIS Coordinator and possible solutions shall be agreed upon prior to any further data acquisitions If upon assessing the entry the IBIS Coordinator Page 7 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager determines that the problem arose
5. 10 0 5 7 Calibration N A 5 8 Maintenance For NIST Standard Cartridge Case maintenance information see the Firearms Unit Technical Procedure for Instrument Calibration and Maintenance 5 9 Sampling N A 5 10 Calculations N A 5 11 Uncertainty of Measurement N A Limitations N A Safety Examinations performed in the Firearms Unit are inherently dangerous These procedures involve hazardous chemicals firearms and ammunition All hazardous procedures shall be performed in compliance with the State Crime Laboratory Safety Manual If the examination involves a biohazard the Forensic Scientist shall use proper personal protective equipment such as eye protection a lab coat and or gloves References Association of Firearm and Tool Mark Examiners Procedures Manual 2001 IBIS Training Guide IBIS Quick Reference Guide IBIS Procedures Manual Records e FA Worksheets Main IBIS Firearm Bullet Cartridge Case Shotshell and Disposition Results e Report from report writer module e IBIS Maintenance Log e Computer Security Incident Report Form Attachments e User Guide for NIST SRM 2461 Standard Cartridge Cases Page 9 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evi
6. 201199999 Anywhere Sheriff s Office Case 11 88888 and 2 Items Q 3 Q 4 and Q 5 Agency Items D E and F in North Carolina State Crime Laboratory case R201299999 Anytown PD Case 12 88888 This information is to be used only as an investigative lead as this possible association has NOT BEEN CONFIRMED If confirmation is required for court proceedings please coordinate with Anytown PD and resubmit the items in the above paragraph for microscopic comparison under the original North Carolina State Crime Laboratory case numbers 5 4 IBIS Quality Control 5 4 1 The following describes the IBIS proficiency test program that shall be administered annually to each employee authorized to make entries into the IBIS system This proficiency test program shall adhere to the Laboratory Procedure for Ensuring the Quality of Test Results 5 4 2 The purpose of acquiring images of a National Institute of Standards and Technology NIST Standard Cartridge Case minimally on a yearly basis calendar year is to address two issues 1 ensuring that the IBIS hardware and software is calibrated and performing properly and 2 ensuring that authorized personnel are acquiring data according to established training and protocols Over a period of time the correlation scores of the NIST Standard Cartridge Case may be evaluated for trends in performance of the technician and IBIS system 5 4 3 The NIST Standard Cartridge Case shall be entered into IBIS on a
7. ASES A Draft Data Acquisition Procedure for the Integrated Ballistics Identification System IBIS The NIST SRM standard cartridge case is intended for quality testing of automated ballistics signature acquisitions It is recommended that an acquisition of the standard cartridge cases be entered into IBIS once a month to venfy the proper operation of the system However you should refer to your own laboratory s policy and procedure guidelines PPG s for the frequency of acquisition The cartridge case should also be entered into the system dwing each software and hardware upgrade as well as after amy scheduled or unscheduled maintenance All entries and results should be documented Follow standard procedures from the manufacturer for maintenance and setup of the system and for calibration check at tum on Procedure for establishing Case Maintenance EXAMPLE Case ID Suuth QA 2012 07 Event Type Test Fire TF Law Agency Unknown Date of Occurrence Date entered into system All other categories may be left blank Under Case ID the Smith represents the last name of the IBIS user the QA indicates that it is a Quality Assurance test and the 2012 07 represents the year and month that the case is entered into the system The rest of the case information should be self explanatory EXAMPLE Exhibit ID SRM 2461 103 TF Caliber 9 mm Luger Event Type TF All other categories can be left blank Und
8. BIS system as well as the alignment of the cartridge case Handling and Cleaning Procedure The standard cartridge cases are expected to be robust and maintain their quality over many years However it is a good procedure to avoid handling the surface of the head in order to avoid unnecessary scratches and finger contamination from maning it Likewise cleaning should also be avoided as much as possible because the cleaning process itself can introduce ureversible changes in the surface topography of the carndge case If it is clear that contamination has been introduced on the surface to the extent that it has been visibly changed then a mild cleaning procedure may be used The suggested procedure ts to clean only the contaminated area with a lab swab cotton tip applicator moistened with ethyl alcohol SRM 2461 Page 11 of 11 Page 15 of 15 All copies of this document are uncontrolled when printed
9. Technical Procedure for Integrated Ballistics Identification System IBIS North Carolina State Crime Laboratory Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager 1 0 2 0 3 0 4 0 5 0 Technical Procedure for Integrated Ballistics Identification System IBIS Purpose To outline the procedures for use of the Integrated Ballistics Identification System IBIS Scope This procedure applies to IBIS users questioned evidence items and known test fired items chosen for entry into IBIS Definitions Bullet A non spherical projectile for use in a rifled barrel Cartridge case The container for all other components which comprise a cartridge Correlation An automatic process whereby two images are compared to determine their similarity Land impression The impression on the bearing surface of a fired bullet created by the land of a rifled barrel Primer The ignition component of a cartridge e Rifling Helical grooves in the bore of a firearm barrel to impart rotary motion to a projectile Equipment Materials and Reagents e IBIS BRASSTRAX System located in the Raleigh laboratory e IBIS Backup Tapes located at the SBI in Raleigh e NIST Standard Cartridge Case Serial Number 166 located in the Raleigh laboratory Procedure 5 1 Integrated Ballistics Identification System IBIS BRASSTRAX 5 1 1 5 1 2 5 1 3 IBIS BRASSTRAX
10. an one if different individual characteristics are found to have reproduced better on different evidence items 5 1 5 3 3 For each evidence item selected for entry into IBIS the Forensic Scientist shall provide the IBIS Technician with the following information Laboratory Case Number Q number caliber offense and date of offense submitting agency and agency file number 5 1 5 4 Verify test fired cartridge case selections for IBIS This information shall be noted in the case notes If found suitable for entry according to the Page 3 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager specifications herein test fired cartridge cases shall be entered into IBIS If a questioned cartridge case has been identified to a firearm for which a test fire will be entered the Forensic Scientist may choose to also enter the questioned cartridge case into IBIS based on the Forensic Scientist s training and experience 5 1 5 5 Import the IBIS Correlation Results page into the Case Record Object Repository for cases in which a possible IBIS association has been confirmed 5 1 6 The IBIS Coordinator the IBIS Technician or any Forensic Scientist with current IBIS certification shall
11. arms Unit Issued by Physical Evidence Forensic Scientist Manager Attachment A continued e After acquisition follow as reasonably closely as possible the outline shown below see Figure A5 Figure A5 Ejector mark Golden Image Try to set the focus position in the muddle of the ejector mark see Figure A6 Sct focus here Figure A6 Focus point for ejector mark imaging SRM 2461 Page 10 of 11 Page 14 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager Attachment A continued Make sure to pull the stopper back when measuring the ejector mark Figure A7 Figure A7 The mage on the right bottom shows the shadowed portion The stopper needs to be pulled back in this case The image on the right top shows the Golden Image with the stopper pulled back and no shadowing Once the acquisition 1s completed a manual correlation of that exhibit needs to be conducted with the region 6 server where the Golden Image resides Once the correlation has been completed record the result n the archival records for the laboratory Once that has been done delete the Case ID from the system This will ensure that your case does not get correlated agai
12. dence Forensic Scientist Manager Revision History i Version Effective Date Reason Number 09 17 2012 Original Document 02 15 2013 Removed Raleigh from the header 4 0 added text in parentheses 11 15 2013 3 Added issuing authority to header removed references to SBI 5 and SBI 21 5 4 3 added a reference to the User Guide for NIST SRM 2461 02 26 2014 4 Standard Cartridge Cases 10 0 added attachment added Attachment A Header and various subsections corrected to reflect organizational change 5 1 2 changed confirmed to made in first line and changed procedure to reflect updated ATF protocol added new 5 1 3 09 05 2014 5 5 1 6 2 2 changed found to made and the pertinent items are in the custody of the Laboratory 5 1 6 4 changed procedure to reflect updated ATF protocol 5 3 10 changed suggested report wording to reflect updated ATF protocol removed various suggested report wording regarding bullet entry Page 10 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS North Carolina State Crime Laboratory Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager Version 5 Effective Date 09 05 2014 Attachment A User Guide for NIST SRM 2461 Standard Cartridge Cases APPENDIX USER GUIDE FOR NIST SRM 2461 STANDARD CARTRIDGE C
13. e Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager 5 2 8 2 Once the evidence item has been entered into the IBIS system the technician shall then turn the evidence back over to the Forensic Scientist and the return transfer of evidence in the FA System shall be completed 5 3 IBIS Report Wording 5 3 1 5 3 2 5 3 3 5 3 4 5 3 5 5 3 6 5 3 7 5 3 8 5 3 9 The suggested report wording listed below may be modified at the Forensic Scientist s discretion to reflect more accurately his her conclusions Any such modifications to report wording shall be reviewed and approved with the technical review Test Fired Cartridge Case Entered e A cartridge case test fired in the K 1 firearm was entered into the Integrated Ballistics Identification System IBIS Additional reports will follow if any forensic leads are developed Test Fired Cartridge Cases Unsuitable for Entry e No test items were entered into the Integrated Ballistics Identification System IBIS Cartridge cases test fired in the K 1 firearm were unsuitable for IBIS entry Test Fired Cartridge Cases Not Entered Unacceptable Caliber e No test items fired by the K 1 firearm were entered into the Integrated Ballistics Identification System IBIS Cartridge cases fired in caliber 22 Long Rifle firearms are not currently being entered into IBIS Revolvers e No test items were entered into the Integrated Bal
14. ed to have the firearm submitted for examination if they require confirmation of the association 5 2 IBIS Protocol 5 2 1 All evidence shall be submitted by using a Request for Examination Form with only one 1 agency case or incident per Request for Examination Form 5 2 2 Test fired cartridge cases created by the submitting agency shall be submitted on an SBI 21 All mandatory fields Case Incident Recovery Date Information on firearm shall be completed Multiple cases may be submitted on one IBIS Test Fire Submission Form Page 4 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager 5 2 3 A firearm submitted as an IBIS only case that does not function and cannot be quickly repaired or that is not a crime weapon or cannot be linked to an individual safe keeping found property no suspect etc shall not be test fired for IBIS entry An exception to this policy must be requested by the appropriate District Attorney US Attorney Judicial Official or Federal State Official and shall be approved by the Physical Evidence Section Forensic Scientist Manager 5 2 4 If the date of offense is older than two 2 years it shall be left to the discretion of the IBIS Coo
15. er Exhibit info SRM 2461 indicates the SRM Model the 103 represents the three digit serial number associated with the SRM 2461 cartridge case and the TF indicates that it is a test fire Follow the manufacturer s procedure for acquiring a cartridge case For most conditions use the same procedure as that for automated imaging of ordinary cartridge cases However the following actions ae recommended Breech Face Make sure that the breech face images are optimally focused Images out of focus will likely cause the correlation to drop The inner and outer diameters of the nings need to be within 0 001 inch 0 0254 mm of the corresponding diameters for the Golden Image which are 0 062 inch inner red ring in Figure Al and 0 146 inch outer blue ning respectively The ring centering with respect to the inner and outer circumferences is also important SRM 2461 Page 7 of 11 Page 11 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager Attachment A continued Figure Al Suggested outer and inner ning placement for breech face Golden Image ring diameters Outer ring 0 146 inch inner ring 0 062 inch Firing Pin The diameter of the se
16. from the entering employee the IBIS Coordinator shall inform the employee of the issue and the employee shall reenter the QC sample If it is determined that the problem arose from a system change or failure Forensic Technology Inc FTD shall be contacted and made aware of any issue 5 4 7 For the purpose of proficiency testing the IBIS Coordinator shall do the following 5 4 7 1 Review the entry of the NIST Standard Cartridge Case to ensure that proper Laboratory and IBIS user manual procedures are followed 5 4 7 2 Evaluate the image quality and correlation results of each item entered 5 4 7 3 Review documentation and results with the IBIS Technician 5 4 8 Results of the proficiency test shall be documented and maintained in the appropriate proficiency test file 5 5 IBIS Computer Security and Incident Response Procedures 5 5 1 The IBIS system is part of a computer network run and maintained by the Bureau of Alcohol Tobacco Firearms and Explosives as part of the National Integrated Ballistics Information Network NIBIN Because of this participation in the NIBIN network all possible precautions shall be exercised in preventing any unauthorized access of the IBIS system and any damage to the system that could affect the network These precautions include reporting any security incidents to the BATFE as soon as possible Access to the Database is limited to the IBIS Technician and those Forensic Scientists who have current IBIS Certif
17. have the following responsibilities with respect to IBIS entries 5 1 6 1 Be responsible for screening the correlations of all test fired and evidence cartridge cases entered into IBIS Cartridge case entries may be correlated outside the Default Correlation Region NC SC TN KY by entering a manual correlation request and selecting specific geographical locations for correlations A manual correlation request is done in cases where an investigative lead points to a specific location outside the Default Correlation Region 5 1 6 2 In the BRASSTRAX database mark the test or evidence cartridge case correlated against the database as the reference cartridge case 5 1 6 2 1 Compare at least the top ten 10 entries on the correlation sheets 5 1 6 2 2 If a possible association is made and the pertinent items are in the custody of the Laboratory advise those Forensic Scientists whose cases are involved and coordinate the examination of the reference cartridge case against the possible association cartridge case 5 1 6 3 Be responsible for entering information into the IBIS Hit List BRASSTRAX 5 1 6 4 Generate a report in FA for the case or cases involved which will notify the agencies of the possible association see suggested report wording below If the hit is a result of test fires submitted by an agency on an IBIS Test Fire Submission Form the agency shall be notified of the possible association by phone and or email and instruct
18. ication through the BATFE 5 5 2 The IBIS Technician shall have the following responsibilities 5 5 2 1 Notifying the IBIS Coordinator of any security problems or suspected security problems as well as any problems with the IBIS equipment especially any equipment involved in network communications 5 5 3 The IBIS Coordinator shall be the designated IBIS security officer and shall have the following responsibilities 5 5 3 1 Notifying BATFE of any security issues or problems through the use of a Computer Security Incident Report Form The form shall be faxed to the appropriate BATFE representative The IBIS Coordinator shall keep a copy of any security form submitted to BATFE The IBIS coordinator shall be responsible for following up with BATFE on any security incidents 5 5 3 2 Notifying BATFE of all IBIS users through the use of a BATFE Information Access form See Appendix I This form shall be completed for each user of the IBIS system and faxed to BATFE for processing The original of each form shall be kept on file with the IBIS Coordinator 5 6 Standards and Controls N A Page 8 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager 6 0 7 0 8 0 9 0
19. in the custody of the Laboratory the Forensic Scientist s whose cases are involved will coordinate the confirmation of the association Page 1 of 15 All copies of this document are uncontrolled when printed Version 5 Effective Date 09 05 2014 Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager 5 1 4 The IBIS Technician shall have the following responsibilities 5 1 4 1 Enter and correlate all IBIS entries 5 1 4 1 1 These procedures may be found in the IBIS Training Guide and Quick Reference Guide for IBIS Users Copies of both guides are kept in the IBIS room of the Firearms Unit 5 1 4 2 Report item entry information on a monthly yearly and ad hoc basis by using the report writer module of the IBIS system 5 1 4 3 Perform backup of all IBIS information each week At the beginning of each week the back up tape from the previous week shall be removed from the IBIS system The next sequentially numbered tape shall be inserted into the tape drive At the completion of a four 4 week cycle the four tapes shall be taken to the designated off site location where they shall be stored and where the new four weeks set of backup tapes shall be retrieved The new backup tapes shall be installed in the IBIS system for the following four
20. lected area needs to be within 0 001 inch of the corresponding diameter for the Golden Image ring placement which is 0 062 inch see Figure A that is in the range 0 061 inch to 0 063 inch Avoid the mismatch in sizes shown in Figure A3 Figure A2 Suggested ring placement for firing pin diameter 0 062 inch 0 001 inch SRM 2461 Page of 11 Page 12 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager Attachment A continued Gz a a D 0 051 inch D 0 062 inch Figure A3 Diameter difference in the firing pin correlation may result in a low correlation score Ejector Mark e Make sure the ejector mark is vertically centered during the measurement and that the rotation is correct In Figure A4 the ejector mark im the left hand image is positioned too low Figure A4 The image on the left shows an ejector mark that is not positioned in the center SRM 2461 Page 9 of 11 Page 13 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Fire
21. listics Identification System IBIS Cartridge cases fired in revolvers are not entered into IBIS Evidence Cartridge Case Entered e The Q 1 fired cartridge case was entered into the Integrated Ballistics Identification System IBIS Additional reports will follow if any forensic leads are developed Evidence Cartridge Case Not Entered Unsuitable e The Q 1 fired cartridge case was unsuitable for entry into the Integrated Ballistics Identification System IBIS Evidence Cartridge Case Not Entered Unacceptable Caliber e The Q 1 fired cartridge case was not entered into the Integrated Ballistics Identification System IBIS Cartridge cases fired in caliber 38 Special firearms are not currently being entered into IBIS IBIS Indicated a Possible Association Page 6 of 15 All copies of this document are uncontrolled when printed Version 5 Effective Date 09 05 2014 Technical Procedure for Integrated Ballistics Identification System IBIS Version 5 North Carolina State Crime Laboratory Effective Date 09 05 2014 Physical Evidence Section Firearms Unit Issued by Physical Evidence Forensic Scientist Manager e Based on the acquisition and correlation review of digital images the Integrated Ballistics Identification System IBIS has indicated a possible association between the following items 1 Items Q 1 Q 2 and Q 3 Agency Items A B and C in North Carolina State Crime Laboratory case R
22. nst any future evidence type cases entered into the system 8 The correlation scores for the breech face impression firing pin impression and ejector mark must all be higher than minimum contro values Cer SRM 2461 Cr SRM 2461 Czu SRM 2461 when compared with the master entry as calculated with IBIS Software Rev 3 6 The control value may change in the future as the IBIS software or hardware changes Start with trial common control values of 214 for breech face 171 for firing pin and 400 for ejector mark Once the local laboratory has established a history of control values the user may wish to set a control value that is higher than these consistent with for example a 95 confidence level of achieving the control value 9 Plot the correlation scores on contro charts along with previous scores to indicate the uniformity of the high correlation If any of the correlation scores drops below the C value flag the results and the date then double check the alignment and reacquire the cartridge case images 10 If the correlation score still remains below the C value you may want to have another trained IBIS user enter the cartndge case into the system If the cartridge case scores at or above the C value then you may have a user issue If the score is still low then you may be observing a change im the system performance that needs to be diagnosed Check the image acquisition procedure This may include checking the calibration of the I
23. rdinator or Section Forensic Scientist Manager as to whether evidence cartridge cases are entered into IBIS 5 2 5 If the seizure date of a firearm is older than two 2 years it shall be left to the discretion of the IBIS Coordinator or Section Forensic Scientist Manager as to whether test fires from that firearm are entered into IBIS 5 2 6 Only the following calibers shall be accepted as IBIS ONLY cases 25 Auto Pistol 7 62 x 39mm Rifle 223 Remington 5 56 NATO 32 Pistol 38 357 Pistol 9mm Pistol 380 Pistol 357 Sig 40 S amp W Pistol 10mm Pistol 41 Pistol 44 Pistol 45 Pistol 5 2 6 1 At the discretion of the IBIS Coordinator or Section Forensic Scientist Manager any unspecified caliber fired from a semiautomatic firearm may be entered 5 2 7 Cartridge case only cases and firearm cases that are submitted where the offense listed is IBIS ONLY note the submitting OCA must be completed and the correct offense listed in the Additional Analyses Requested Instructions block may be assigned to the IBIS Technician 5 2 8 Internal chain of custody 5 2 8 1 If evidence is turned over to the IBIS Technician and or the entry is completed out of view of the Forensic Scientist the transfer of evidence shall be documented Page 5 of 15 All copies of this document are uncontrolled when printed Technical Procedure for Integrated Ballistics Identification System IBIS North Carolina State Crime Laboratory Physical Evidenc
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