Coworker of United States Postal Service employee found dead on riverbank arrested for murder in Utah

New details have released how police say they were able to tie a 75-year-old to the murder of a 53-year-old postal worker.

On July 2, Masako Kenley, 53, had a dinner date with people she knew from work but failed to show up. The woman’s husband reported her missing the following day and Sandy police located her body on July 5.

FrontPageDetectives reported on Kenley's death when her remains were found, but police were mum on details at this time. This week, new details were released about her killing.

COWORKERS ALLEGE MURDER SUSPECT WAS ‘OBSESSED’ WITH USPS VICTIM FOUND DEAD ON UTAH RIVERBANK

Police said Kenley was shot once in the chest and once in the neck, where she was also stabbed four times.

The day Kenley’s body was found, police arrested William Richard O’Reilly at a hospital after he attempted suicide.

According to the Salt Lake City Tribune, the 75-year-old suspect was allegedly captured on video driving Kenley’s van with her in the passenger seat from a business to a wooded area. Around an hour later, he then allegedly returned the vehicle to the business without her inside.

Citing charging documents, the newspaper reported O’Reilly allegedly told police he put a tracking device on Kenley’s vehicle and she became upset when he let her know.

She allegedly told O’Reilly that “they were done and to take the GPS tracker off her vehicle,” the charging documents state.

Investigators found a GPS device, bloody clothing, ammunition during a search of O’Reilly’s home.

"I heard that she knew, or had problems with him in the past,” Jill Jensen, the victim’s supervisor at the United States Postal Service, told KUTV.

The station reported coworkers alleged O’Reilly seemed “obsessed” with Kenley.

O’Reilly faces charges of murder, felony discharge of a firearm, and obstructing justice.