Columbia, Mo. ? Missouri running back Derrick Washington was accused of sexual assault by a former tutor in June and still could face criminal charges related to the incident that may be behind his indefinite suspension.

Boone County court records show the woman, a Missouri graduate, obtained a protection order against Washington on June 22. She accused the senior captain and starting tailback of entering her off-campus apartment three days earlier in the middle of the night and sexually assaulting her.

A prosecutor is still investigating, and Washington’s family has hired an attorney.

Missouri coach Gary Pinkel announced Washington’s suspension for undisclosed reasons Thursday. Washington has led the Tigers in rushing yards each of the past two years.

Should Washington be charged with a crime, his suspension could extend beyond the Sept. 4 game. School policy says that athletes charged with a felony cannot return to the field until the case is resolved.