Mark Matheny, White Supremacist, Allegedly Stabbed His Wife Because She Left Him for "Another Worthless Tweeker"

See also: Mark Matheny Accused of Failing to Kill His Wife and Himself

Mark Matheny -- the alleged white supremacist who barricaded himself inside his house near Queen Creek on Tuesday -- didn't make it incredibly difficult for investigators to find out his motive for allegedly stabbing his wife last week.

According to court documents obtained by New Times, investigators noted a public Facebook post Matheny wrote shortly before the attack, in which Matheny's wife -- whom he referred to as "that stupid bitch" -- left him at a bar so she could meet up with "another worthless tweeker."

The Maricopa County Sheriff's Office found Matheny on Tuesday, as he's suspected of stabbing his wife last week with a 6-inch KA-BAR combat knife, then beating her with brass knuckles.

After he barricaded himself inside a house, authorities eventually went inside and found that Matheny was trying to commit suicide by strangling himself with a telephone cord.

Court documents describe what led up to that incident, as he was knocking on the door of a Mesa man's apartment around 2:30 a.m. on August 30, demanding that his wife come out.

Someone opened the door for Matheny, and he chased her down to a walk-in closet and stabbed her in the abdomen, according to the documents.

He then proceeded to punch her multiple times in the face, head, and body, causing cuts on her head and in her mouth, the documents say.

Matheny's wife was transported to a hospital in Scottsdale, and was treated for life-threatening injuries, including a collapsed lung, lacerated kidney, and lacerated diaphragm.

According to the other man in the apartment, Matheny stabbed him too, and had to get his forehead stapled up due to the cut, documents say.

Investigators then noted a few Facebook posts Matheny typed out shortly before the attack:

A SWAT team went into the home Matheny had barricaded himself in on Tuesday after a search warrant was obtained, and he was found hanging inside.

"The defendant did not succeed," according to the court documents.

Investigators also made some recorded statements Matheny made after they found him, including that he hadn't eaten since he stabbed his wife, and "blacked out" after seeing his wife with "another dude," the documents state.

Court documents say Matheny is a member of the Aryan Brotherhood, and had Aryan Brotherhood paraphernalia in his possession when he was arrested. He also has a swastika tattooed on his chest.

Matheny has multiple domestic-violence reports against him in the past, and investigators say he shows no remorse for stabbing his wife or the other man, according to the documents.

Matheny faces one count of attempted murder, two counts of aggravated assault with serious injury, and two counts of aggravated assault with a deadly weapon. His bond was set at $270,000.

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Matthew Hendley
Contact: Matthew Hendley