Prosecutors trying the case of a former Rutgers University student accused of using a webcam to spy on his roommate have begun building their case that he tried to cover up his crimes.

Jurors heard testimony Tuesday on how a Rutgers official looked at defendant Dharun Ravi's (dah-ROON' RAH-vee) Twitter posts after roommate Tyler Clementi was reported missing.

Gone was a post that students testified they had seen "daring" people to video-chat with him at a time when Clementi was planning to have a guest in the dorm room.

Clementi killed himself later that day in September 2010.

Ravi is charged with invasion of privacy, bias intimidation and several counts that allege he tried to cover his tracks.

(Copyright 2012 by The Associated Press. All Rights Reserved.)