One of the most humiliating crimes government commits is stealing someone's gun after they defend themselves or others from a criminal. It's a crime on top of a crime.
This treats the defender as the criminal. And often, they never get their property back.
There’s never a reason for government to steal the defender’s gun after an act of self-defense.
It's not "evidence". Letting government steal someone's defensive weapon as "evidence" in a crime they didn't commit, but stopped, is nothing but a lie told to disarm them. Any legitimate "evidence" could be collected at the scene without stealing anyone's weapon.
Treating self-defense as a crime is the real crime.
It's a punishment for doing the right thing. A punishment for demonstrating that the cops were useless and unnecessary, and that "laws" don't protect the innocent from freelance criminals. It gives government criminals a foot in the door.
Sometimes, the criminals of the state add other punishments on top of "only" stealing the gun. This is the opposite of justice, and should come with tar and feathers, ropes and light poles, for the crooked judge, cops, and prosecutors.