A 20-year-old Anadarko, Okla., man pleaded not guilty Thursday to charges related to an alleged November 2014 rape of a fellow Haskell Indian Nations University student in his dorm room.

The man pleaded not guilty Thursday to aiding and abetting attempted aggravated criminal sodomy, aggravated criminal sodomy, aiding and abetting attempted rape and two counts of rape.

Prosecutor Catherine Decena alleges the man both sexually assaulted a 20-year-old woman and helped his 19-year-old co-defendant, charged with two counts of rape and one count of sodomy, to commit sex crimes with the same victim during the man’s encounter.

The crimes are alleged to have occurred during the early-morning hours of Nov. 15, 2014, in a Haskell dorm room that the two defendants shared. The two men have been expelled from Haskell in light of the allegations.

The man is scheduled to next appear in court on Sept. 25, according to Cheryl Wright Kunard, assistant to the district attorney.

His codefendant pleaded not guilty last week. He is scheduled to next appear in court on Oct. 9.