HOMER CITY, Pa.—Police say a husband and wife have been charged with sexually assaulting and raping a teenage girl over a three-year period.

The Indiana Gazette ( http://bit.ly/ISukFr) reports Wednesday that 83-year-old Ralph Duncan allegedly began assaulting the girl in 2009 when she was 13, and then began raping her last year.

Officials say Duncan's wife, 34-year-old Katherine Duncan, knew about the alleged crimes and aided in them.

Ralph Duncan was charged with rape, indecent assault and endangering the welfare of children. Katherine Duncan was charged with conspiracy to commit rape, indecent assault and endangering the welfare of children.

According to court papers Ralph Duncan was released after posting $50,000 bail and his wife was released on $25,000 bail.

A number for the Duncans couldn't be located to seek comment.

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Information from: The Indiana Gazette, http://www.indianagazette.com