The son of a police detective opened fire at a Nebraska high school Wednesday, fatally wounding the assistant principal and forcing panicked students to take cover in the kitchen of the building just as they returned from holiday break.

In a rambling Facebook post filled with expletives, Butler warned Wednesday that people would hear about the "evil" things he did and said the school drove him to violence.

He wrote that the Omaha school was worse than his previous one, and that the new city had changed him. He apologized and said he wanted people to remember him for who he was before affecting "the lives of the families I ruined." The post ended with "goodbye."

http://abcnews.go.com/US/wireStory?id=12551783

My heart goes out to both families.   :( :( :(