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A Toquerville teen charged as an adult in the death of a neighbor woman has been deemed incompetent to stand trial.

Joshua David Canfield, now 19, is accused of shooting and killing 58-year-old Geraldine Bommarito on March 18 or 19, 2014, when Canfield was still 17 years old.

On Thursday, after 5th District Judge John Walton and attorneys in the case reviewed the reports of three mental health experts, the attorneys stipulated that Canfield is not competent to stand trial, according to the court docket.

The judge ordered Canfield sent to the Utah State Hospital for treatment.

A hearing to review Canfield's progress was set for Sept. 10.

Canfield was charged as an adult with first-degree felony counts of murder and aggravated robbery, one count of second-degree felony arson, three counts of second-degree felony theft, one charge of second-degree felony obstruction of justice, along with third-degree felony charges of aggravated assault and possession or use of a controlled substance. He was also charged with misdemeanor theft and two counts of assaulting a police officer.

Washington County sheriff's deputies found Bommarito's body on March 19 while investigating an unrelated burglary at a Toquerville home, where two firearms and collectible coins were taken that morning.

While investigating the burglary, deputies identified the teen — who is Bommarito's neighbor — as a possible suspect.

Earlier on March 19, the teen was seen at a convenience store in Washington City, where he made a purchase using coins consistent with those taken in the burglary, according to charging documents.

Witnesses provided a vehicle description and license plate number for the vehicle driven by the suspect, which investigators traced back to Bommarito, the registered owner. When investigators went to the residence listed on the vehicle registration, they discovered the body of the woman, who had been shot at least once.

That afternoon, detectives located Canfield in Springdale and took him into custody.

According to charges, the teen was "belligerent and combative" with arresting officers.

Canfield was not booked into jail until three days later because he was receiving treatment at a medical facility, according to court records. The Associated Press said Canfield reportedly tried to cut his throat after being arrested. He appeared in a booking photo wearing a neck brace.

Canfield faces up to life in prison if convicted of the murder count in adult court. In the juvenile system, he could be kept at a detention facility only until he turned 21.