OLATHE, Kan. (AP) — A judge has ordered a mental competency examination for a 19-year-old man charged with sexually assaulting a girl in a child welfare office.

Michael Anthony Hamer is charged in Johnson County with rape and aggravated indecent liberties with a child.

Prosecutors allege Hamer assaulted a 13-year-old girl in May while they were at a KVC Health Systems office in Olathe. They were both in the state foster care system at the time.

Defense attorney Courtney Henderson sought the evaluation because he thinks Hamer doesn’t fully understand the gravity of the charges against him and would not be able to effectively help in his own defense.

District Judge Brenda Cameron granted Henderson’s request. A hearing on the competency issue is scheduled for Jan. 10.