Bill Montag, whose daughters Heidi and Holly Montag both starred on the MTV reality series The Hills, has been arrested on charges of child sex abuse and incest, Denver's Channel 9 News reports.

Montag was arrested Thursday evening in Aspen, Colorado after an alleged victim came forward saying he had sexually abused her from when she was 13 until she was 17.

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A 29-page arrest affidavit outlines at least 50 different instances of the abuse, which began in 1993. However, due to the statue of limitations, Montag can only be charged with crimes that occurred after July 1, 1996, when the victim was 16.

The victim told authorities that she has decided to come forward two decades later to help prevent other girls from becoming victims.

There is no indication that Montag is accused of abusing Heidi or Holly.