When a 16-year-old girl attended Sam Houston High School in Houston, Texas a teacher’s assistant made sure she got between classes and on and off of the school bus safely.

While she is a 16-year-old girl, her dad said she has special needs.

“Her mental comprehension is like that of a 5-year-old,” said her dad. “She don’t understand the difference between right and wrong, and good and bad.”

On January 17, her parents said the school called. She did not get on the bus or come home as her parents looked in northeast Houston.

One day later, the girl showed up at her grandma’s home. Her parents said they took her to the hospital and tests showed she had been raped. She said two man offered her a ride.

“She don’t understand the difference between not trusting people,” said the girl’s mother. “She said I’m trying to get home. They took advantage of her.”

Her mother says she blames the school district and the teacher’s assistant. She said it was his responsibility to make sure she got on the bus safely, and she said her school admissions documents prove it.

The school district says, as part of the agreement with the parents, she was allowed unsupervised bathroom breaks. This is when the school believes she snuck off.

The Houston Independent School District released this statement:

Administrators are currently reviewing an incident involving a 16-year-old student who left Sam Houston MSTC High School on Thursday [January 17] afternoon to ensure proper procedures were followed.

A preliminary review of the situation indicates that the student left the school after telling a staff member that she was going to restroom. At this point, there is no indication that standard protocol was not followed.