Uni killer bought ammunition on eBay

Virginia Tech killer Cho Seung-Hui went on eBay less than a month before the massacre to buy ammunition clips for one of the two handguns he used in the rampage.

The online auction site lists the purchase date of the empty clips as March 22, about three weeks before the attack in which Cho, 23, killed 32 people and himself at the university in Blacksburg on Monday.