A Kalispell sex offender has denied sending threatening messages to Flathead County officials and sending letters to U.S. Marshals claiming he would go on a killing spree if the agency did not look into a crime of which he says he was wrongly convicted.

Dale Michael Hanson, 65, entered a not guilty plea to felony intimidation before Flathead District Judge Heidi Ulbricht on Thursday. He also entered a not guilty plea to a 2009 charge of failure to register as a sex offender.

Hanson has been trying for years to clear his name after he was convicted in 1995 of sexually assaulting a young boy. He was released from prison in 2005. However, he did not register as a sex offender because he maintained his innocence.

According to court documents, Hanson sent the U.S. Marshals Office in Missoula a letter on Aug. 3 in which he wrote that he was warning the agency that “there are going to be a bunch of dead people if your agency does not intervene on my behalf!!!”

He allegedly wrote that he had been fighting the “Nazi bastards of Flathead County Montana” for 22 years for crimes he claims he did not commit. He also asserted that the Marshals could “get to the truth and prevent bloodshed” by talking to the family of the victim of the sexual assault.

In addition to the letters sent to the Marshals, Hanson also allegedly sent letters to the Flathead County Sheriff’s Office in which he threatened judges, court staff and members of law enforcement, totaling 18 individuals.

“I will never set foot in their kangaroo courtrooms ever again,” the letter allegedly read.

He also allegedly wrote: “When they send their Nazi bootjack death squad after me, it will be to execute me. All I need is to see them and I’ll be pumping as much lead at them as I can before they kill me, and I will make them kill me! I’ll take as many of them with me as I can. They may take my life, but they’ll never take my freedom again!”

Hanson is being held on $500,000 bond. His trial was set for Jan. 17.

Hanson’s most recent brush with law enforcement comes after the Montana Supreme Court denied an appeal in which Hanson claimed the Flathead District Court abused its discretion in a case that Hanson filed in an effort to be pardoned of the sexual assault.

The legal team argued that the sexual assault victim’s mother had left Hanson messages in which she vowed to get back at Hanson for seeing other women and told him how much she hated Hanson. The messages were not admitted at trial.

Some potential witnesses also claimed they weren’t aware they could testify on Hanson’s behalf because a now-deceased sheriff’s deputy warned them to stay away.

Flathead District Court Judge Robert Allison allowed Hanson’s exoneration case to proceed, but Hanson refused to show up at three court-ordered dispositions because there was a warrant out for the 2009 failure to register case.

Allison and the high court found that argument was not enough to allow his exoneration case to proceed.

“Allowing a litigant to ignore a court order to appear for a disposition because of an outstanding warrant cannot be tolerated,” Montana Supreme Court Justice Laurie McKinnon wrote in 2015.