Va. Tech Gunman Had No Drugs In System

The student who killed 32 people at Virginia Tech before committing suicide had no prescription drugs or toxic substances in his system, state police said Thursday.

The toxicology tests, performed as part of Seung-Hui Cho's autopsy, answered one of the key remaining questions in the investigation of the gunman who opened fire April 16 in a dormitory and a classroom building.

Cho, 23, shot himself as officers closed in. His autopsy report confirmed that he died from a self-inflicted gunshot wound to the head, police said.

State police said they will not release the complete autopsy reports on Cho or his victims because the criminal investigation is ongoing.

A state panel investigating the shootings is reviewing Cho's contact with the mental health system. Cho was ordered into involuntary outpatient treatment in 2005 after a judge found that he was a threat to himself. But there is no indication he ever received treatment.