Campus killer had mental problems

A 14-year-old student who opened fire at his Ohio high school, wounding four people before killing himself, had a history of mental problems and was known for cursing at teachers and bickering with students.

Asa H. Coon, who had been suspended for fighting, warned classmates of an attack but none took him seriously.

"When he got suspended, he was like 'I got something for you all,"' said student Frances Henderson, who said she often got into arguments with Coon. "I guess this is what he had."