Recently when I was in my lgs they were telling me a story of something that had happened the week before.
Apparently a guy brought in a mossberg 500 to sell while looking it over they saw something on it they suspected to be blood, while talking to each other about it, the guy heard and said it was paint from him painting a room earlier that week. They didn't really believe it but bought the gun from the guy anyway. couple days later police show up looking for the gun since it had been used to hit a person in the face during a robbery. They got in no trouble for purchasing the firearm from the guy at all.
I would suspect the only way you would get in trouble is if you knew you were purchasing a gun used in a felony because you might be considered a accomplice.
Apparently a guy brought in a mossberg 500 to sell while looking it over they saw something on it they suspected to be blood, while talking to each other about it, the guy heard and said it was paint from him painting a room earlier that week. They didn't really believe it but bought the gun from the guy anyway. couple days later police show up looking for the gun since it had been used to hit a person in the face during a robbery. They got in no trouble for purchasing the firearm from the guy at all.
I would suspect the only way you would get in trouble is if you knew you were purchasing a gun used in a felony because you might be considered a accomplice.