arma virumque cano (et alia)
Any chance the guy who shot himself was the former boyfriend of the bride? It happened in Russia which means that the people who did it were stoopit furriners. No red-blooded MerKKKun would ever do such a thing.
Actually, it's called Polish Roulette when you use a semi-auto.
Drunk people do the damnedest things. And drunk people with guns, forget about it.