“The video does show what appears to be a 9mm cartridge. Wonder where he got it.”
Same thing happened at the Boulder Rifle Club when on of the Boulder denizens complained that a stray round had hit his house from the range. Never mind that his house was a couple of miles away and in the opposite direction. He showed the officer a complete 30-06 round, case and all, sticking out of his house. He got arrested.
I remember that.