PITTSBURGH (AP) — The mother of Pennsylvania twins whom child welfare caseworkers haven’t been able to locate for more than 10 years has been ordered to undergo a mental health evaluation.

A district judge postponed Monday’s preliminary hearing for Patricia Fowler on charges she endangered the children and obstructed efforts to find them. The judge rescheduled the hearing for Sept. 12 and said the evaluation must be done before then.

The Penn Hills woman and her lawyer declined to comment.

Police say Fowler has given various accounts of where the 17-year-old twins live, none of which have checked out.

Her son, 18-year-old Datwon (DAY’-twahn) Fowler, is charged with pretending to be one of the twins and sending a text to police saying they’re OK. He doesn’t have an attorney listed in court records.