The man, known only as M.B., has asked a judge to reverse his order to turn his name over to attorneys representing Clementi's roommate.
M.B. told the judge in a written statement he fears his name will leak out. \
The judge ruled that prosecutors must disclose the name to Dharun Ravi. Ravi is accused of bias intimidation and other charges.
Clementi committed suicide days after the alleged incident, triggering a national conversation about bullying of young gays.