ODESSA, Texas — Authorities say a 22-year-old man accused of posing as a high school student in Texas is now facing a sexual assault charge.

Police in Odessa, Texas, say Guerdwich Montimer turned himself in Friday after a 16-year-old girl reported that she had a sexual relationship with him last summer when she thought he was 15-year-old Jerry Joseph.

Montimer was originally arrested Tuesday on a misdemeanor charge of failure to identify himself to a police officer. Officials say he posed as a sophomore and helped lead Permian High School to the state basketball playoffs.

Suspicions were raised after coaches from Florida said they recognized Joseph as Montimer, a 2007 graduate of a Florida high school.

Jail records have no information on an attorney for Montimer.