An 18-year-old Arizona man is accused of killing his mother and then calling 911 to report she’d been kidnapped.

A jogger found the body of Mary Collier, 38, just after 9 p.m. Tuesday night in a field in San Tan Valley, the Pinal County Sheriff’s Office said.

Less than 10 minutes after the discovery of the body, another 911 came in from nearby. That call, investigators say, came from Collier’s teenage son, saying his mother had been kidnapped. Investigators quickly determined that the dead woman was the second caller’s mother.

“We don’t have any evidence to show that there was an actual kidnapping,” Lt. Ross Teeple told KPNX. “It indicates they walked out together, both of consent, and then once out there she was attacked and then just left in the desert.”

Teeple said there was some kind of argument between the two prior to the murder and that it appeared Collier died from blunt force injuries.

The suspect, who has not yet been named, was taken to a hospital with what the sheriff’s office described as “self-inflicted wounds.”

“He will be booked into the Pinal County Jail for First Degree Murder upon his release from the hospital,” the department said.

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[Featured image: KPNX screenshot]