[Crowbob]

Thank you, Craigster.

So if the actual gun, as a piece of evidence, was contaminated, is it still admissible? Can Baldwin argue that it cannot be proven, by virtue of the evidence having been broken and repaired, that the actual firearm COULD NOT have fired a live round without pulling the trigger?

It sounds like the examiners of the firearm broke it. As such, the actual firearm is not in the same condition as it was when Baldwin killed the women without having pulled the trigger.