It's on FR. The ex was being interrogated by LE when the 2nd shooting occurred. They've positively IDed the bullets in both shootings as coming from Cho's gun. The 2nd shooting included the killing of prof Librescu, who protected the students in his
Solid Mechanics class in room 204, around the end of class, by charging and blocking the door. Looks like he was shot through the door maybe. The shooter killed 28 in rapid sucession. A cell phone recording contained the sound of the police blowing the doors, that hte perp had chaained open. The cops found him dead with a self inflicted head shot.
The gun shop owner posted a note on another blog that gave the shooters name and immagration status, before it was ever released, about an hour after the 2nd shooting.