Stephen Kazmierczak "outstanding" student and a "disturbed individual."

Authorities are describing the gunman who killed five students at Northern Illinois University yesterday as both an "outstanding" student and a "disturbed individual."Police say Stephen Kazmierczak carried a shotgun hidden in a guitar case and three handguns onto the campus. They say he bought the weapons legally and had a valid Firearm Owner's Identification Card required of all Illinois residents who own guns.Campus police say Kazmierczak "had stopped taking medication and become somewhat erratic in the last couple of weeks." But they declined to provide details.In Lakeland, Florida, the gunman's father briefly came to the door of his home and asked reporters to leave him alone. Saying "this is a very hard time," Robert Kazmierczak said he would make no statements, then broke down in tears.