AFTE Store - Technical Report: IBIS Correlation Results Analyzing Methodology and Reliability Factor

This research suggests an improved methodology for analyzing the Integrated Ballistics Identification System (IBIS) Correlation Results and for setting up a Reliability Factor of the IBIS Correlation results. The motivation for developing the methodology was mainly a result from the desire of the Israeli Division of Identification and Forensic Science (DIFS) uppermanagement to reduce the labor -intensive manual searches in the open crimes file collection and to base the search more and more on the IBIS. The new methodology is based upon entry of two cartridge cases into the IBIS -DAS and at a later stage a third and fourth cartridge case may be required to be entered. It has three phases: Partner Test Procedure, Operator Error Checking Procedure and Identical Twin (ID-TW) Test Procedure. The Reliability Factor, based on the results of each phase, places at the discretion of the firearms examiner the extent (if any) manual examination of the open crimes file collection is required. Results: We feel that this new method and reliability factor has indeed produced more effective use of IBIS with a minimum of additional DAS and SAS operator time.