It sure looks like, from the blood at the back of his head, that he probably put the gun in his mouth and pulled the trigger...not destroying his face at all. Odd.
The wikipedia page says he killed himself with a gunshot to the temple...but I see no evidence of that. Huh. There is some blood coming out of his left ear and maybe, maybe a wound in the shadowy area above that ear, but I really can't tell.
Now, being some idiot with access to the internet who just found a small anomaly in a massive report about a complex crime...it is my sworn duty to say:
See? Virginia Tech was a hoax, liberal gun grab by Obama (who wasn't president yet...but whatever...he's a Muslim!).
I wish I was joking...but google Virginia Tech Hoax and see what you get. Spoiler alert: people are stupid!