Police have identified the man who killed a Virginia Tech campus police officer Thursday as 22-year-old Ross Truett Ashley, a student at the nearby Radford University. Ashley killed himself after shooting the officer and sending the campus into lockdown. Police knew his name, but withheld it from the press until Friday because his family had not yet been informed. Ashley is likely the same man who stole a white Mercedes SUV in Radford on Wednesday, police said. Virginia Tech is the site of the largest college-shooting-rampage in recent memory, a 2007 massacre that left 32 people dead.