Karl Halverson Pierson, Gunman in Colorado, Was "Very Opinionated Socialist"

From News.com.au:

A TEENAGER who may have had a grudge against a teacher opened fire with a shotgun at a Colorado high school, wounding two students before killing himself...

Arapahoe County Sheriff Grayson Robinson identified the shooter on Friday night as 18-year-old Karl Halverson Pierson.

The shooter entered Arapahoe High School armed with a shotgun and looking for a teacher he identified by name, Sheriff Robinson said...

Thomas Conrad, who had an economics class with the gunman, described him as a very opinionated Socialist.
"He was exuberant I guess," Conrad told The Denver Post.