Requests for Primer Residue (PR) examinations of samples obtained from living persons suspected of firing a weapon will be routinely accepted. Primer Residue kits collected from the following will not be routinely accepted: gunshot victims, inanimate objects, and individuals found in possession of a weapon. There is no need to submit a CA letter with the submission of any PR case. New submission guidelines are posted on our website: https://dfs.virginia.gov/wp-content/uploads/2016/06/Trace-Policy-Change.pdf