[MadPenguin]

Even if this were possible, how does a prosecutor prove the shell casings found at the crime scene weren’t planted? Are you going to be able to retrieve every piece of brass every time you go to the range? Miss just one and it could fall into the wrong hands.

[Cobra64]

Go to a police range, pick up the brass, and scatter it around crime scenes. Forensics will go nuts.

We're surrounded by morons.

[taxcontrol]

So I am thinking that - assuming that micro stamping is required - a well planned crook would just collect the brass from a couple of gun ranges, sort out his caliber, and then at the crime scene, police his brass and toss down a couple of handfuls of the collected brass.

Might be obvious that the scene was tampered but it sure would slow down the cops.