Richard Parenteau Jr. was convicted earlier this month of two counts of first-degree murder for beating and suffocating Linda Parenteau, 70, and attacking David Wells, 69, with an ax after the couple told him he had to move out of their house.

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In the three weeks since a jury found Richard Parenteau Jr. guilty of killing his mother and stepfather in the South Park neighborhood in July 2014, he has sent letters and photos of the victims’ bodies to several King County judges, Seattle police officers and witnesses involved in his case.

Just this week, King County Jail officials intercepted one such letter, but another missive was received by a Western State Hospital doctor at his home address, Deputy Prosecutor Brandy Gevers told Judge Julie Spector on Wednesday during Parenteau’s sentencing on two counts of first-degree murder.

“In almost 18 years, this court has presided over a significant number of murder trials. This one will remain an outlier in its cruelty and viciousness,” said Spector, who sentenced Parenteau to just over 55 years in prison, the harshest punishment allowed her under law.

She warned Parenteau that he was to have no contact with a lengthy list of individuals involved in his case. She told the 49-year-old that if he attempts to send mail to any of them she will find him in contempt of court and add additional time to his prison term.

The letters accused officials of corruption and conspiracy and the photos were taken either during the victims’ autopsies or at the sites where their bodies were recovered, Gevers said.

Parenteau, who represented himself at trial, received copies of the photos as well as the state’s witness list and other documents as part of the discovery in his case, court records show. It isn’t clear how he obtained the home address for the state psychiatric-hospital doctor.

“Your crimes are more despicable for … this fantastical conspiracy theory,” Spector said. She was referring to Parenteau’s insistence that he was a CIA whistle-blower and that his mother and stepfather were killed by someone else to keep Parenteau from exposing the Union Gospel Mission as a front for a drug cartel.

“No one else did this. You remain a menace to the family and the entire community,” Spector said.

During  Wednesday’s hearing, Parenteau accused the court, police and Western State Hospital of corruption and planting evidence against him. Doctors at the hospital examined Parenteau before he was found competent to stand trial.

During the trial, jurors were told that Parenteau killed Linda Parenteau, 70, and David Wells, 69, on July 18, 2014, because they had demanded he move out of their house by Sept. 1. Parenteau then drove Wells’ body to a small park along the Duwamish Waterway and dropped his mother’s body off the First Avenue South Bridge. Passers-by found their remains the next day.

When police arrived at the house, Parenteau calmly walked out, smoking a cigarette, jurors heard. Wells’ blood was later found in a shower, Linda Parenteau’s blood was found in the couple’s minivan and police determined Parenteau had attempted to clean up the crime scene.

Gevers, who prosecuted Parenteau alongside Senior Deputy Prosecutor Don Raz, said the prolonged suffering of the two victims and the level of brutality inflicted by the son they had long supported warranted a sentence at the high end of the standard sentencing range.

Linda Parenteau, who was wearing her bathrobe, was beaten, strangled and suffocated with a wad of paper towels — and likely died looking up at her son — said Gevers, calling her death “shockingly horrific.”

Parenteau then ambushed his stepfather in the living room, attacking him with an ax when Wells came home for lunch, expecting to take his wife shopping that afternoon, said Gevers. “This was a viscous beating, a brutal death,” she said before a courtroom packed with the couple’s family, friends and neighbors.

“The violent deaths of my aunt and uncle have deeply traumatized me and my family,” said Dina Davis, Linda Parenteau’s niece.

Davis said she lives near the Duwamish Waterway, now a constant reminder of Wells’ death, and works near the First Avenue South Bridge, a structure she can’t go near without sobbing.

Wells’ son, Mark Wells, spoke briefly, telling the judge his father was “kind-hearted and loving.”