AZTEC — A district court judge ruled Friday that John Mayes would be sentenced as an adult in the slaying of Dr. James Nordstrom in June 2011.

Judge William Birdsall said that reports filed by a court-appointed psychiatrist and the Juvenile Probation Office guided his decision.

"Many of the conclusions contained in the amenability report were, to put it mildly, very concerning to the court," he said.

Birdsall said that his decision to sentence Mayes as an adult was not determined solely by the fact that Mayes would age out of the juvenile system in September at age 21.

Birdsall said he agreed with public defender Stephen Taylor, who said that Mayes' age should not be the sole factor in determining his amenability, or potential for rehabilitation. Taylor requested that, if Mayes were sentenced as an adult, that the court try to find an alternative facility that would best serve his needs.

Taylor further argued that Mayes had no prior history of violence before the murder and that his age at the time of the offense mitigated his culpability.

Chief Deputy District Attorney Brent Capshaw pointed to the court-appointed psychiatrist's report in his argument for an adult sentence.

"The report ... makes it clear that he is somewhat of a danger even being incarcerated," he said. "He is definitely a danger to the community if released."

Capshaw said that Mayes' history of burglary and smoking marijuana should also be taken into account.

"I think the history indicates an ongoing problem," he said. "Someone who was resistant to aid by his parents to remedy some of these problems."

Mayes is the adopted son of Farmington City Manager Rob Mayes.

After a two-week trial, John Mayes was convicted in November of second-degree murder and aggravated burglary, among other lesser offenses, for murdering Norstrom with a pool stick at the doctor's home on San Marcos Drive in Farmington.

As an adult, Mayes faces a maximum 15 years in prison.

Mayes is already expected to be sentenced to six years in prison after pleading guilty to planning a jail break at a local juvenile detention center in January 2012. According to The Daily Times archive, Mayes, then 18, and two juvenile accomplices planned to snap the neck of a night guard before scaling a fence and fleeing.

According to the plea agreement, Mayes pleaded guilty to conspiracy to commit aggravated battery, conspiracy to attempt to escape from jail and two counts of contributing to the delinquency of a minor. One count of conspiracy to commit murder was dismissed in exchange for his guilty plea.

Mayes' is expected to be sentenced in both cases in the next 60 to 90 days, but a specific court date has not yet been set.

"The sentencing is going to be a very serious matter," Birdsall said. "I will set aside any time that is appropriate. I am sure there are going to be individuals who wish to speak to the court. I will give as much time as they need."

Steve Garrison covers crime and courts for The Daily Times. He can be reached at 505-564-4644 and Follow him on Twitter @SteveGarrisonDT on Twitter.