Brother, I feel your pain. The most important element of your planned response is contacting the FBI Ballistics Research Facility. Like everyone else, the Bureau has its strengths and weaknesses, but two of it strengths are its ability to perform reliable and valid ballistic testing and the respect that it has among police executives. I had to deal with the whole myth that 5.56 rounds shoot through walls while pistol ammunition doesn't back in the day. FBI BRF is your friend.