What difference would it make? I have An old Turkish Mauser that probably was used to kill Armenians. It still works just fine for killing deer And elk.
I also own a car that was once owned by a famous rock star. I don’t go around touting that fact though since it has nothing to do with how the car peforms.
Remember: Guns are just tools and can be used for good or evil. It’s up to the operator.
“”What difference would it make?””
You wouldn’t have a problem owning a gun that was used in a crime and it could be traced to you? Try and talk your way out of that. Better know a good attorney.
Kind of like “I’m just holding it for a friend.”