My heart goes out to the family of Dakota DeRemus. And for the friends of the boy accused of taunting and beating him to death, here's a news flash--"good" kids don't do things like that. Nor do "good" kids watch it happen, record it on cell phones, and then run like cowards without calling 911 to leave the boy to die alone.
Good kids may make mistakes, but bullying isn't an accident, it's a series of deliberate acts intended to cause emotional and/or physical pain. There's nothing "good" or funny about it.
When our youngest was in kindergarten, she and her little friends were terrorized on the school bus by a fourth grade boy. The school's response was mediation where my five year old had to confront a tormentor twice her age. She was a wreck and it made matters worse. A few days later, she pleaded with me, in tears, to let her stay home from school. I was spitting nails. Instead of suspending the boy or kicking him off the bus, they hired a guard to ride shotgun to protect the smaller children.