An arrest warrant says DNA evidence on a bloody sock found in the ceiling and an ink pen found under the body of a Yale graduate student links an animal research technician to her killing.

The body of Annie Le was found stuffed behind a Yale research lab wall in September.

Authorities say in the warrant released Friday that the green-ink pen found under Le's body had her blood on it as well as DNA from suspect Raymond Clark III on its cap.

SLIDESHOW: Yale Graduate Student Murdered

Police say Clark signed into the secure building with a green pen on Sept. 8, the day Le disappeared.

The warrant says DNA from both Le and Clark was on the bloody sock found hidden in a ceiling.

The document also says Clark moved a box of wipes to hide that it had blood splattered on it.

A message was left for Clark's public defender Friday.