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Ingersoll was last seen in Wabasha, Minnesota on December 16, 1990. She had been drinking alcohol and got into an argument with her boyfriend, Gary Murphy. She was last seen running out the back door at 11:45 p.m. Ingersoll has never been heard from again. She did not take her purse, vehicle or any money with her when she vanished. The temperatures in the area that night were very cold, and she may not have been wearing a coat.
An extensive search of the area turned up no indication of Ingersoll's whereabouts. Murphy committed suicide in the summer of 1991, but it's unclear whether his death was a result of Ingersoll's disappearance. One of her friends stated Ingersoll and Murphy had a good relationship; the friend does not believe Murphy would have harmed her. Foul play may have been involved in Ingersoll's case. It remains unsolved.
Ingersoll resided in Hammond, Minnesota in 1990.