LINCOLN, Neb. (AP) — Union College in Lincoln has hired an outside organization to investigate the Jan. 14 accident that seriously injured a 23-year-old gymnast from California.

Heather Boulais, of Laguna Niguel, California, fell 23 feet while installing aerial silks in the college gym before one of the acrobatics team’s practices. Her parents, Terry and Cheryl Boulais, say doctors are trying to regulate the pressure on her brain from the trauma. Her skull was fractured.

Union College President Vinita Sauder says the outside organization will gather facts, determine what happened and make recommendations. Sauder didn’t there was no timetable for the investigation.

Union College is a four-year college that’s owned and operated by the Seventh-day Adventist Church.