U.S. flag

An official website of the United States government, Department of Justice.

NIJ Training Course for Firearm Examiners: Chemical Testing Technique Using the Bashinski Procedure

An interactive tool used to supplement the NIJ online training course entitled 'Firearm Examiner Training', as outlined in the twelfth learning module, 'Gunshot Residue and Distance Determination'. This brief demonstration shows the placement of filter paper on a dark-colored surface used to detect bullet residue that may mask the blue-violet coloration of a positive result, also known as the Bashinski Transfer Technique. 

Date Published: June 23, 2020