Not to be cynical in light of this tragedy, but did all three men die at the same time? If that’s the case we’re raising a nation of wimpy men. Three on one and dude is supposedly wielding only a knife and the three men are dead. If I’m assuming something that is wrong my apologies.
Other reports have indicated that this mutant was living in some sort of special accommodations for people with mental problems who have trouble acclimating themselves to the real world. So I’m not sure how capable these three would have been anyway.