COLUMBUS, Neb. (AP) — A 66-year-old Columbus man is facing a criminal charge after police say he molested his granddaughter over a four-year period.

The man has been scheduled for arraignment on Tuesday in Platte County District Court on a felony charge of third-degree sexual assault of a child.

The newspaper isn’t identifying the man in order to protect the privacy of the victim.

Columbus Police Sgt. Bret Strecker says the assaults began when the girl was 8 years old and continued for four years. He says the girl was living with the man and his wife and that the attacks would take place after the woman left for work.

The girl, who is now a teenager, tells police the attacks ended when she asked her grandfather if the behavior was wrong.