The Manor Independent School District says 62-year-old Gilbert Joseph Briseno has been fired for questionable conduct.
Travis County Jail records show Briseno was being held Friday on $200,000 bond. No attorney was listed for Briseno, who was booked Thursday on a charge of continuous sexual abuse of a child.
Manor police Sgt. Ryan Phipps says bus security video shows more than one alleged incident of the girl being abused.
School officials were notified last week by a person who noticed a girl standing as the bus was moving. Police believe the child was molested when she and the driver were alone in the vehicle.