Heidi Montag's father, Bill Montag, was arrested Thursday in Aspen on suspicion of sexual abuse and incest with a 13-year-old girl over the course of years.

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A 29-page arrest affidavit accused Montag of abusing the girl at least 50 times between 1993 and 1997 starting when she was 13 years old. The alleged abuse took place in the family's home when they lived in Frisco and Centennial, Colo.

Under the statute of limitations, though, Montag can only be charged for any crimes that allegedly took place after July 1, 1996, when the girl was 16 years old.

The alleged victim said she came forward to protect any other girls from being abused.

Montag works as a ski instructor. He was being held at Pitkin County, Colo., jail.

His daughter, Heidi Montag, appeared on reality television shows "The Hills" and "Laguna Beach: The Real Orange County." Heidi's sister, Holly Montag, also appeared on "The Hills."

There's no indication in the arrest affidavit that Heidi or Holly were abused by their father.