A man accused of stabbing his mother to death and injuring his father before setting fire to their Snohomish County home was charged Wednesday.

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A man accused of stabbing his mother to death and injuring his father before setting fire to their Lake Stevens-area home on Thursday told investigators he was acting in self-defense.

Zachary R. Konicke, 29, claims he stabbed his parents after they attacked him during a confrontation over him taking his mother’s car without permission, according to an arrest affidavit filed by Snohomish County sheriff’s investigators.

His mother, Vicki Konicke, had called 911 around 8:45 p.m. Thursday to report that her son had taken her car without permission, the affidavit said. About 2½ hours later, his father, Mike Konicke, called 911 to report their son had attacked them with several knives in a drug-fueled attack.

That call was followed a few minutes later by a second call from Mike Konicke, who reported his son had set their home on fire.

Zachary Konicke, of Redmond, was charged Wednesday in Everett District Court with first-degree murder, domestic violence and first-degree arson, domestic violence. He is being held in jail in lieu of $1 million bail.

Neither of Konicke’s parents, who are both 58, were named in the affidavit, but were identified by neighbors and through property records.

When deputies arrived at the burning house late Thursday, they found Zachary lying on the ground, about 50 feet from the home. He had suffered a fractured heel after jumping out a second-story window, the affidavit said.

An injured Mike Konicke was also found outside the home.

The man’s wife was missing, and her body was later found inside the burned out house, the affidavit said.

Snohomish County Medical Examiner Dr. Daniel Selove ruled she died of “homicidal violence” and injuries consistent with a knife attack. She has not been formally identified by Selove’s office.

The Konicke home was destroyed in the blaze.

Mike Konicke was initially taken to an Everett hospital before being transferred to Harborview medical Center in Seattle. He has since been released, a Harborview spokesman said Wednesday.

When deputes interviewed Zachary Konicke at a hospital, he “appeared calm, collected and able to easily answer questions,” the affidavit said.

He told deputies that he stabbed his mother in the head, chest and leg after she attacked him. While explaining the attack, he said his parents were “extremely strong” and “cool as cucumbers”; he also believed his parents were “possessed,” the affidavit said.

His brother, Alexander, who was with him at the hospital, told investigators that his brother was a regular user of mushrooms and ecstasy. Alexander Konicke told deputies that two days before the attack, his brother had taken drugs before he “shaved off all of his body hair and doused himself in gasoline,” the affidavit said.

After that incident, Zachary Konicke calmly told his brother about “religion, spirits, the devil and ‘them’ watching, talking and chasing him,” the affidavit said. The affidavit does not say who “them” refers to.

Alexander told investigators that he dialed 911 after the Jan. 12 incident because he feared his brother was going to hurt himself or someone else.

He said that his brother, who had been living with him in Redmond, voluntarily agreed to be committed for “an evaluation” at a Kirkland hospital. The men’s parents agreed to have Zachary move back into their home once he was released from the hospital, the affidavit said.

The affidavit does not say whether Zachary was evaluated or hospitalized between the incident Jan. 12 and the fatal attack.

Zachary Konicke was named as the respondent in a petition for an anti-harassment protection order filed by a Seattle woman one day before the deadly attack. She didn’t show up in King County District Court on Friday afternoon, so a temporary protection order was issued.