BLOOMINGTON, Ind. (AP) — Indiana University’s director of student ethics has resigned amid allegations that he sexually assaulted a woman at a December conference.

The school said in a statement Friday that Jason Casares had tendered his resignation effective immediately and that it would say nothing else about it because it was a personnel matter.

Casares was hired in 2011 as the school’s student ethics officer and a deputy Title IX coordinator.

The school placed him on administrative leave in early February after a woman said he sexually assaulted her at a conference in Fort Worth, Texas.

Casares’ attorney didn’t respond to an email or voicemail seeking comment.

No criminal charges have been filed. Police in Texas said Friday that they’re still investigating the woman’s allegations.