Virginia Tech shooting probe focuses on Cho's online activities

NARROWS, Va. (AP) — Computer forensics are playing a key role in the probe of the Virginia Tech gunman, with investigators revealing he bought ammunition clips on eBay designed for one of two handguns used to kill 32 people and himself.
The eBay account and other Internet activities provided insight Saturday into how Seung-Hui Cho may have plotted for the rampage, including the purchase of several empty ammo clips about three weeks before the attack.
EBay spokesman Hani Durzy said the purchase of the clips from a Web vendor based in Idaho was legal and that the company has cooperated with authorities. Attempts to reach the Idaho dealer were unsuccessful.
"Within 24 hours, after Cho's identity was made public, we had reached out to law enforcement to offer our assistance in any investigation," Durzy said.
Authorities are also examining the personal computers found in Cho's dorm room and seeking his cell-phone records.