UPDATE: 12:08 p.m. -- The man known only as "M.B." testified today that it was "strange" to see a webcam pointed at him while he had a sexual encounter in the bed of his date, Tyler Clementi.
"I noticed there was a web cam, faced over in the direction of the bed. I just thought it was strange. Being in a compromising position," M.B. said according to the New York Post. "It just caught my eye that there was a camera lens looking right at me."
The camera allegedly sat on top of the computer belonging to Clementi's Rutgers University roommate, Dharun Ravi. Ravi is accused of spying on the two men and writing about it on Twitter days before Clementi committed suicide in September 2010.
M.B. also told the prosecution that he didn't give anyone permission to watch their tryst and that he expected it to be private, the New York Daily News reports.
After first meeting Clementi on a social networking site for gay men, M.B. said that he visited Clementi three times in the New Brunswick dormitory room. On Sept. 16, he left before 2 a.m. -- the time Ravi was expected to return. On his second night there, Sept. 19, he says he had sex with Clementi and noticed the webcam for the first time. This was the night that Ravi and a friend used the webcam, according to earlier testimony. About five students stared at M.B. when he left building that night, he said.
M.B. says that he returned to Clementi's room on Sept. 21. Ravi allegedly tried to use the webcam again that night, but Clementi had unplugged it.
PREVIOUSLY: After days of expectation, a mystery man known only as "M.B." began testifying in the webcam spying trial of Dharun Ravi today.
Tyler Clementi, who was Ravi's freshman roommate at Rutgers University, invited "M.B." to his dorm room in September 2010 for two dates. Days after apparently learning that Ravi used a webcam to watch their tryst, Clementi jumped from the George Washington Bridge.
Ravi, now 20, is on trial for allegedly bullying Clementi, 18, because he's gay and invading his privacy. He's also charged with witness and evidence tampering, because prosecutors say he tried to cover his tracks when police probed the events leading up to Clementi's death. If convicted fo the most serious charges, he faces 10 years in prison.
The defense counters that Ravi's behaved immaturely, but insists that he didn't hate Clementi for being gay.
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As a victim of Ravi's supposed crimes, "M.B." -- described as about 10 years older than Clementi -- has fought to remain anonymous. It was reported that he might be called earlier this week, but the prosecution refused to disclose if and when he would be summoned. His request to protect his identity has been honored by the judge's orders that media can only film and photograph him from the neck down.
Ravi's defense is expected to argue that Ravi used the webcam because he was suspicious of "M.B." -- not because he was homophobic.
Earlier witnesses in the week-old trial testified that Ravi said Clementi's companion appeared "shady" and "creepy."
Molly Wei, a friend of Ravi's, said they used a computer in her room to activate the webcam. They saw Clementi and M.B. embracing, but turned off the camera after a few seconds she said.
But Ravi wrote on Twitter about seeing Clementi kissing another man. When Clementi asked for private use of their room a few nights later, Ravi tweeted that people should link to his webcam to watch.
On Thursday, the prosecution called one of Ravi's former ultimate frisbee teammates who said that Ravi "appeared uncomfortable" with having a gay roommate.
Geoffrey Irving, the ex-teammate, also said Ravi discussed Clementi's sexuality several times and revealed that he planned to watch him via the webcam on a second occasion.
The defense unsuccessfully sought a mistrial yesterday, claiming that prosecutors had improper contact with a witness. The defense said that prosecutors hindered their ability to cross-examine Lokesh Ojha, who testified about helping Ravi set up the webcam, by talking to him on Wednesday.
Judge Glen Bermann denied the motion, saying that the contact was benign and limited to Ojha misstating where was the webcam.