STILLWATER, Okla. —  Nathan Michael Cochran, 22, of Stillwater is accused of sexually touching and groping two friends as they slept. Three sexual battery charges were filed Wednesday in Payne County District Court as part of a joint investigation into sexual abuse potentially involving victims in Stillwater, Tahlequah and on the Oklahoma State University campus. The investigation continues.

Here’s a timeline of events that led to Wednesday’s charges.

Dec. 11: Cochran doesn’t appeal the decisions reached by the Office of Student Conduct Education and Administration. He receives a three-year suspension and ordered to stay away from the complainants. The suspension begins Friday. The university releases documents from the sexual misconduct hearings.

Dec. 10: Stillwater police spokesman Capt. Randy Dickerson said the department’s investigation into sexual-abuse complaints has expanded to Oklahoma State University and the city of Tahlequah. FarmHouse International Fraternity Executive Director Chad E. Harris said the assaults didn’t occur at the fraternity’s chapter house, a fraternity event or involve new member training. The student, Harris said, is no longer a member of the fraternity. Harris praises the chapter’s and OSU’s response to the situation.

Dec.  8: Stillwater police confirm reports they are investigating allegations of sexual assault by a former member of the FarmHouse fraternity.

Dec. 7: Stillwater police receive information about numerous sexual assaults committed in and around Stillwater involving a former FarmHouse fraternity member. Police launch an investigation.

Nov. 30: The Oklahoma State University of Student Conduct holds five separate hearings. The hearings conclude at approximately 5 p.m. and Cochran is found responsible for four of the five complaints.

Nov. 29: Cochran tells the Office of Student Conduct he will not attend the Nov. 30 hearings. He does not seek a continuance.

Nov. 28: Three more people file complaints with the Office of Student Conduct. As a group, they discuss the allegations with staff. Options are discussed with the students. A Nov. 30 hearing is set.

Nov. 19: Office of Student Conduct meets with Cochran who denies accusations. A hearing is set for Nov. 30.

Nov. 16: Office of Student Conduct and second person discuss the allegations and if he wants to pursue police action.

Nov. 13: Second person provides written complaint against Cochran.

Nov. 12: The Oklahoma State University Office of Student Conduct meets with first person to discuss allegation. The person states he isn’t interested in going to police.

Nov. 9: First person provides written complaint to Office of Student Conduct.

Nov. 7: The president of FarmHouse fraternity seeks information from Oklahoma State University about the process for students to report allegations of sexual misconduct. The Office of Student Conduct Education and Administration gives the fraternity five sexual assault victims packets. The packets contained information on counseling services, how to file misconduct complaints and how to contact Oklahoma State University police or the Stillwater Police Department.