Illinois Shooting Update: Guns Legal, Gunman On Meds.

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DEKALB, Ill. - The man who gunned down five people at Northern Illinois University in a suicidal rampage became erratic after halting his medication and carried a shotgun to campus inside a guitar case, police said Friday.

Two of the weapons — the pump-action Remington shotgun and a Glock 9mm handgun — were purchased legally less than a week ago, on Feb. 9, authorities said. They were purchased in Champaign, where Kazmierczak was enrolled at the University of Illinois.

The other weapons were still being traced.

Campus Police Chief Donald Grady said investigators recovered 48 shell casings and six shotgun shells following the attack in Cole Hall. The gunman paused to reload his shotgun after opening fire on a crowd of terrified students in a geology class, sending them running and crawling toward the exits. He shot himself to death on the stage of the hall.

Kazmierczak, whose first name was earlier listed as Steven, was taking some kind of medication, Grady said.

"He had stopped taking medication and become somewhat erratic in the last couple of weeks," Grady said, declining to name the drug or provide other details.