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Ravi posted a message on his now-closed Twitter account on Sept. 19: “Roommate asked for the room till midnight. I went into molly’s room and turned on my webcam. I saw him making out with a dude. Yay.”

Prosecutor Bruce J. Kaplan said in a statement: “We will be making every effort to assess whether bias played a role in the incident, and, if so, we will bring appropriate charges.”

A lawyer for Clementi’s family did not respond to requests for comment on whether Clementi had come out to friends and family about his sexual orientation. He also said the family had no comment.

The mourning continued at Rutgers; in Ridgewood, the suburban New Jersey town where Clementi grew up and attended high school; and across New Jersey.

Clementi’s violin teacher for the past five years could not believe he had taken his own life.

“He was a very genuine and, I guess, you could call it a shy person,” said Khullip Jeung, 33, who teaches out of his home in Fort Lee. “But when he played the violin, it was different. He had a strong voice. He knew what he wanted to say. And he spoke through his violin. And I think that is the real Tyler that I knew.”

Childhood friend Mary Alcaro, who played in a summer music academy with him, said Clementi had been destined for greatness.

“I’ve never heard anyone make a violin sing the way he did,” she said in an e-mail.

Even Gov. Chris Christie had something to say.

“As the father of a 17-year-old, I can’t imagine what those parents are feeling today,” he said. “Those people who led him to that bridge are going to have to bear that responsibility for the rest of their lives.”

Students at West Windsor-Plainsboro Regional High School, from which Ravi and Wei graduated, remembered them as nice people who were not in any way homophobic.

Ravi had gay friends, said Derek Yan, 16, a junior. Yan said he chatted online with Ravi about what college life was like, and Ravi “said he was lucky to have a good roommate. He said his roommate was cool.”

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Mulvihill reported from Haddonfield. Contributing to this article were Associated Press news researcher Rhonda Shafner in New York; videographers Ted Shaffrey in Ridgewood and Bonny Ghosh in Plainsboro; and writers Angela Delli Santi in Trenton and Wayne Parry in Atlantic City.