An Oxford, Mississippi, police officer has been charged with the murder of a north Mississippi mother.

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The shooting happened Sunday afternoon in the 1000 block of Suncrest Drive. Officers arrived to the scene to find an “unresponsive person” who was pronounced dead at the scene.

The victim was identified as Dominique Lashelle Clayton, 32. She was the mother of four, according to neighbors.

Friends told WHBQ-TV that Clayton was shot in the back of the head during a domestic situation. Her 8-year-old son found her after being dropped off at the house by a family member on Sunday.

Interim Oxford Police Chief Jeff McCutchen said the department learned on Sunday that Matthew Paul Kinne, an Oxford police officer, was possibly "involved" with Clayton. The Mississippi Bureau of Investigation took over the case, and Kinne was developed as a suspect.

Dominiques Clayton's sister, Shyjuan, said Kinne and Dominique Clayton had been having an affair.

Kinne was arrested Monday night and is being held in the Panola County jail. He is charged with murder.

“We will not hide behind our badge," McCutchen said. "Dominque was a mother, a daughter, a sister, a friend and a member of our community. This day is about her.”

Kinne has been a police officer with the Oxford Police Department for four years.