Twenty-year-old Dharun Ravi faces 15 criminal charges, including invasion of privacy and bias intimidation, a hate crime.
His freshman-year roommate, Tyler Clementi, jumped to his death from the George Washington Bridge in September 2010, just days after Clementi's intimate encounter with another man.
The jury deliberated for about four hours Wednesday without reaching a verdict.
Jurors have 12 days of testimony from about 30 witnesses to consider.
