Richard Aguirre, 51, was taken into custody after a court hearing on an unrelated rape case

By Tara Fowler
Updated June 03, 2015 11:00 AM
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A former Washington cop has been arrested for the 1986 murder of a prostitute.

Richard Aguirre, 51, was taken into custody after a court hearing on an unrelated rape case, the Tri-City Herald reports.

He was linked to the death of Ruby Doss after his DNA was entered into the system as part of the sexual assault investigation, according to CBS News. He voluntarily gave a DNA sample, the Herald reports.

Aguirre was charged with first-degree murder on Tuesday and booked into the Spokane County Jail.

He has pleaded not guilty in the rape case and he denies any involvement in the murder of Doss.

“He has told us that absolutely he did not commit the murder,” Aguirre’s sister Denise Prior told the Herald. “That’s what he has told us and he is very adamant about it.”

An affidavit obtained by the paper states that a friend of Aguirre’s told investigators that he previously admitted to hitting and choking a woman at the time of Doss’ death.

Lawrence Cole said that when Aguirre walked away from the woman “he thought she was still moving,” according to the affidavit.

Police are also looking into the unsolved murders of two other women – Mary Ann Turner, 30, and Kathleen DeHart, 37 – who were killed in a manner similar to Doss in 1986 and 1987, respectively.

Anyone with information on the cases is asked to contact Spokane Police Department Major Crimes detectives at 509-622-5849.

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