Honestly reading the story, and I'm no lawyer ya see, but it seems like the guy first shooting the other guy to try out the vest seems... dumb but legal? But then getting mad when your friend does exactly what you asked for and firing a bunch of rounds into his back after his friend put the vest on seems... dumber but quasi-illegal?

I guess I just generally feel like if two hillbillies want to test out a bulletproof vest, and they both consent, and no one else is in danger, then why should it be illegal? Lord knows being dumb isn't illegal, otherwise half the country would be in jail.