A lab technician is suspected of murdering the Yale graduate student Annie Le, according to ABC News report Tuesday.

The suspect, who authorities believed knew Le, reportedly worked in the same building with Le.

The man, whose name has not been identified, failed a lie detector test, the report said. In addition, he has what appear to be defensive wounds on his chest, suggesting a violent struggle, the report added.

Sources also told ABC News that bloody clothing removed from the lab contained evidence that links the killer to the crime.

We're not believing it's a random act, Officer Joe Avery, a police spokesman, told The Associated Press Monday.

The state medical examiner has said it was a homicide and the autopsy will be released on Tuesday afternoon.

Students are still worried about their safety in campus.

I'm not walking at nights by myself anymore, said student Natoya Peart, 21, of Jamaica. It could happen to anyone, anytime, anywhere.