Medical examiner says Va. Tech gunman died of gunshot to head, caused more than 100 wounds

Virginia Tech gunman Seung-Hui Cho fired enough shots to wound his 32 victims more than 100 times before killing himself with a bullet to his head, a medical examiner said Sunday.

Dr. William Massello, the assistant medical examiner based in Roanoke, said pathologists have sent blood samples for toxicology testing to determine if Cho was on drugs at the time of his rampage. It could take as long as two weeks to get the results of those tests, he said.

Many of the victims had defensive wounds, indicating they tried to shield themselves from Cho's fire, but there was no evidence in the autopsies that Cho struggled with any of the people he killed.