RICHMOND, Va., June 22 (UPI) -- The student who killed 32 people at Virginia Tech was not under the influence of drugs at the time of the massacre, the state medical examiner reported.
In a report to state police, the medical examiner said there was no trace of prescription or illegal drugs in Cho Seung-hui's system, The Richmond Times-Dispatch reported.
While investigators found no drugs in Cho's dorm room, a roommate told police that he remembered Cho taking prescription drugs in the morning. That raises the possibility that Cho's problem was that he had stopped taking medication prescribed for psychological problems.
Cho was ordered to get treatment after a special justice found that he was a danger to himself or others. He had a long history of troubled behavior.
After killing two people in a dorm, Cho made a videotape and mailed it to NBC News, before going on a shooting rampage in a classroom building.
He shot himself as police closed in.