Three boys arrested in the beating death of a homeless man told investigators they attacked the 55-year-old as he slept simply because they were "bored," police said Monday. "Basically, they said they did this because they were bored and they didn't have anything to do,'' said Sgt. Bruce Brock of the homicide squad. "It ended up that their fun was harassing this homeless guy, and things just escalated. It's every parent's worst nightmare to find out your child is involved in something like this." Police arrested the three teens Friday after they admitted beating Dalrus Joseph Brown, who was found...