Watch CBSN Live

More testimony expected Wednesday in Dharun Ravi spycam trial

Dharun Ravi listens to testimony during his trial at the Middlesex County Courthouse in New Brunswick, N.J., Tuesday, March 6, 2012. Pool, John O'Boyle,AP Photo/The Star-Ledger

(CBS/AP) NEW BRUNSWICK, N.J. - At least one more detective is expected to be called to testify in the trial of former Rutgers University student Dharun Ravi. Wednesday will be the ninth day of testimony in the trial.

Pictures: Tyler Clementi
Pictures: Rutgers Spycam Trial

Ravi is accused of using a webcam to spy on roommate Tyler Clementi's intimate encounter with another man. He faces 15 counts including bias intimidation and invasion of privacy against Clementi, who jumped to his death from the George Washington Bridge on Sept. 22, 2010. Clementi's suicide came one day after authorities say Ravi attempted to spy on him.

Jurors learned Tuesday that in the last two days of his life, Clementi visited his roommate's Twitter page 38 times and saved screen shots of two messages posted there. One proclaimed that the roommate saw Clementi "making out with a dude." The other "dared" friends to use a web chat program to watch later.

Prosecutors say Ravi used Twitter first to tell followers that he had seen his roommate "making out with a dude" on Sept. 19, and two days later to "dare" them to video chat him when Clementi had again asked to have the room to himself so he could have a guest over.

Gary Charydczak, a detective in the Middlesex County Prosecutor's Office, testified that Ravi later changed the "dare" tweet, instead telling friends, "Don't you dare." That alleged change is the basis of a charge that Ravi tried to hinder apprehension.

In testimony earlier Tuesday, Rutgers' computer system manager Timothy Hayes told jurors it appears Ravi's computer was used in two video chats on Sept. 21, 2010. However, it doesn't prove that Ravi spied on his roommate but it may bolster the prosecution's case that he was preparing to attempt to spy on Clementi that night. Clementi committed suicide a day later.

Authorities say Ravi used his webcam to see Clementi and another man kissing on Sept. 19 and viewed it from the room across the hall from his own.

Complete coverage of Tyler Clementi and the Dharun Ravi trial on Crimesider

View CBS News In