New Brunswick, New Jersey (CNN) -- The man Tyler Clementi was intimate with just days before he committed suicide took the stand Friday, telling jurors that he had noticed a web camera aimed at Clementi's bed. 

The witness, who prosecutors named only as "M.B." to protect his identity, testified during the sixth day of the trial of a former Rutgers University student, Dharun Ravi. 

Ravi is accused of spying on and intimidating Clementi, his former university roommate, because he was gay. 

M.B., 32, testified Friday that he first met Clementi on an internet social networking site for gay men and that they eventually met in the student's dorm room three times. The two conversed online, exchanged text messages and later had sex. 

At one point when they were together in the dorm room, M.B. glanced over at Ravi's desk and saw "a camera lens pointed at (Clementi's) bed." 

He also testified that he had briefly met Ravi while visiting Clementi. Ravi on one occasion allegedly left the room and came back, "walked to his desk, shuffled around a bit and then walked out." 

M.B. testified that on September 19, 2010, he drove to meet Clementi at his building, three days after the first visit. When he left, M.B. said he saw about five people milling around the hallway who seemed to be looking at him. 

"They didn't say anything," he said. But they were looking at him in a way that made him wonder why they were staring, he said. "But as I was a guest in their building, I just brushed it off." 
What was the witness name?
How old was he?
Why did prosecutors name him that?
On what weekday did he testify?
How many days into the trial?
Who was facing time?
Name one thing he was accused of?
Name another.
Against who?
Why was he doing this to the man?
The witness, who prosecutors named only as "M.B."

The witness, who prosecutors named only as "M.B."
32
M.B., 32, testified Friday that he first met Clementi on an internet social networking site for gay men and that they eventually met in the student's dorm room three times. The two conversed online, exchanged text messages and later had sex. 
to protect his identity,
The witness, who prosecutors named only as "M.B." to protect his identity, 
Friday,
 took the stand Friday,
6 days
The witness, who prosecutors named only as "M.B." to protect his identity, testified during the sixth day of the trial of a former Rutgers University student, Dharun Ravi. 
Dharun Ravi
Dharun 
Spying
Ravi is accused of spying on 
intimidation

Ravi is accused of spying on and intimidating Clementi, 
Clementi
 telling jurors that he had noticed a web camera aimed at Clementi's bed. 
because he was gay.
Ravi is accused of spying on and intimidating Clementi, his former university roommate, because he was gay. 