He should be very proud of being "famous" now.

By all appearances, Zachary Adam Chesser was the boy next door. He played football and was on the crew team at one of the best high schools in the country. He even studied Japanese. He was hardly the sort of boy you'd expect would suggest on a radical Islamic website that the creators of the edgy cartoon series "South Park" will be targeted for death.

But Chesser also had a dark side. He was a "loner," a former classmate said, one who frequently drew pictures of Satanic figures in his notebooks and had just a few friends, most of them male.

"He was definitely sort of weird," the classmate told FoxNews.com. "He was very into violent industrial music, borderline Satanic bands and stuff like that. He had dark undertones in his interests."