UH, hate to tell you this, but it is usually the family that makes these decisions. Did it ever occur to you that maybe, just maybe it was the desire of the family and not some nefarious deed?
Nope. In their grief, I'm sure they agreed to do what ever the school wanted to do. Think "rail roaded."
I believe later they'll look back an see the coldness of it all. They'll remember that he was a man - not a piece of broken school furniture, and then they'll mourn his death as they should.