From the link I posted above:
USA Today, 6/13/2011
Several students who saw Rossman in the period after Spierer vanished questioned the "memory loss," saying he had no bruising or redness to his face that would support the claim.
"Supposedly he had that big altercation, but he didn't look like anything happened to him," said senior Chris Malone, who saw Corey the next morning, Feb. 4.
Rossman was outside his apartment, asking Malone if he'd seen Spierer.
"What's up boys?" Malone quoted Rossman as telling him. "Did you happen to see a little blond girl?"
Malone, who hadn't seen her, said he knows Rossman and roommate Mike Beth because they played in his Fantasy Football League and would sometimes grill together.
"They like to party," he said.
http://www.usatoday.com/news/nation/...-missing_n.htm