Nick Firkus Murder Case: Trial, Life Sentence, and Appeal

The Nick Firkus murder case is the Minnesota prosecution of Nicholas Firkus for the 2010 shooting death of his first wife, Heidi Firkus, in their St. Paul home. Firkus told police an intruder had forced his way in and caused a fatal struggle over his shotgun. The case sat cold for more than a decade before a reinvestigation, his second wife’s suspicions, and new FBI forensic work led to his 2021 arrest. A Ramsey County jury convicted him of first-degree and second-degree murder in February 2023, and he was sentenced to life in prison without the possibility of parole. In February 2026, the Minnesota Supreme Court upheld the conviction.

The Shooting on April 25, 2010

At about 6:30 a.m. on April 25, 2010, Heidi Firkus called 911 from the couple’s home on West Minnehaha Avenue and told the dispatcher, “Someone’s trying to break into my house.” The call lasted roughly 35 seconds. A loud noise consistent with a gunshot came over the line, followed by a scream, and then silence.¹ About 65 seconds later, Nick called 911 and said, “Somebody just broke into our house and shot me and my wife.”²

Officers found Heidi, 25, in the kitchen doorway with a shotgun wound to her upper back. Nick had a wound to his thigh. He told investigators he had woken around 6:00 a.m., heard someone “fiddling with” the front door, loaded his 20-gauge double-barrel shotgun, and roused Heidi. A large intruder, he said, burst through the door, grabbed the shotgun, and in the struggle it discharged twice, striking Heidi and then him. He described the intruder as a Black man in his late 30s, roughly six feet tall and 220 pounds, in a hoodie.¹

Why the Intruder Story Fell Apart

The scene did not match the account. The home was tidy. A wobbly foyer table just feet from the alleged struggle stood undisturbed. The front door showed no torn paint or splintered frame. No suspicious people or vehicles were seen in the neighborhood, and K-9 searches turned up no trail. Only Nick’s DNA was on the shotgun.³⁴

Years later, the FBI reconstructed the audio from Heidi’s 911 call. Analysts heard no sounds of a struggle, no intruder’s voice, and no indication a third person was in the house before the gunshot. The bureau also built a digital scale model of the home and ran ballistics testing. The model placed Nick four to nine feet behind Heidi when the shotgun fired, and it found the wound to his own leg consistent with a self-inflicted, tangential shot. A sound test at the house found that jiggling the front doorknob was inaudible from the master bedroom and only faintly audible from the top of the stairs, contradicting Nick’s account of what woke him.¹

The Financial Motive Heidi Didn’t Know About

Nick had been hiding a slow financial collapse. The couple bought the West Minnehaha Avenue home in 2007. By 2008 he could no longer make payments. In April 2009 the bank served foreclosure documents on Nick alone, not Heidi. The house sold at a sheriff’s sale in June 2009. The couple did not redeem the property.¹

An eviction hearing was set for March 8, 2010. Nick appeared alone, signed an agreement to vacate by March 22, then negotiated an extension by citing his grandmother’s failing health. The sheriff was scheduled to physically remove the couple and their belongings on April 26, 2010, the day after Heidi was killed.¹

Investigators found no sign Heidi knew any of this was happening. Detective Nichole Sipes of the St. Paul Police Department testified that a review of the couple’s emails and text messages turned up nothing about the foreclosure, the eviction, or any plan to move. The rooms were fully furnished and stocked with food. Nothing was packed. Eight days before the scheduled eviction, Heidi invited friends over for a gathering planned for April 30. Two days before the shooting, Nick emailed her about scheduling a meeting with a realtor and contacting U.S. Bank about supposed fraud on their account. The couple had no active U.S. Bank accounts, and no realtor meeting was ever documented.⁵¹

At an eviction hearing roughly 45 days before the murder, Nick had signed a property release form authorizing the disposal of items left behind. Heidi did not sign it, and investigators could find no indication she knew about it. The attorneys handling the foreclosure and eviction said they had never spoken with her.⁵

How the Case Was Reopened

Nick remarried in August 2012. His second wife, Rachel Watson, was the sister of a close friend of Heidi’s. Years into the marriage, Rachel found a notice hidden in Nick’s sock drawer showing their own home was in danger of foreclosure over unpaid property taxes, a crisis he had concealed from her. The pattern shook her. She later testified, “I have children with this person, and the last time he had problems with finances, a lot of things went wrong.”³

Rachel confronted Nick and secretly recorded their conversations. In one exchange, she told him his ease in lying made her think something terrible; when he asked if she meant “that I could murder my wife,” she said, “Yes.”⁶ Nick and Rachel divorced in 2018.

Sgt. Sipes was assigned to the cold case in 2019 and later said it had always bothered her because “the circumstances didn’t seem to fit what happened.” She reviewed the file, re-examined financial records, re-interviewed witnesses, contacted Rachel after learning of the divorce, and partnered with the FBI on the 911 audio and ballistics work.³ Assistant prosecutor Elizabeth Lamin later said Rachel gave prosecutors a “moral push” in the case.⁵

On May 19, 2021, a St. Paul SWAT team arrested Nick Firkus, then 38 and living in Mounds View.⁷⁸⁵

The Trial and Life Sentence

The trial began January 27, 2023, in Ramsey County District Court and ran 11 days.⁹ Prosecutors Rachel Kraker and Elizabeth Lamin argued that Nick killed Heidi to keep his financial failures hidden. Kraker told jurors, “It was not a fictional stranger who broke into home to be afraid of … it was the stranger she married.”¹⁰

The state built its case on the undisturbed foyer, the absence of forced entry, the FBI’s digital model, the self-inflicted character of the leg wound, the silence on the 911 recording, and shotgun pellet marks at the bottom of the front door that prosecutors described as evidence of a staged scene.² Witnesses described Nick as “oddly almost giddy or carefree” after his wife’s death, and his father-in-law testified that Nick volunteered, unprompted, that the intruder had worn gloves.¹

A neighbor, Brendan O’Connor, who had been house-sitting next door, testified he heard a muffled argument, then gunshots and a yell: “You shot her, you shot me. Please, please, no.” The defense pointed to it as evidence of a third person. Prosecutors argued O’Connor overheard Nick on the 911 call. The 911 transcript contains neither “you shot me” nor “you shot her.”²¹

Defense attorney Robert Richman maintained that a real intruder had entered the home and that police failed to look at other suspects. He pointed to tool marks on the front door and argued Heidi knew about the foreclosure and was looking for an apartment. Richman called the financial-shame motive “psychobabble,” telling jurors, “You don’t kill the love of your life to spare yourself from momentary embarrassment.”¹¹ Judge Leonardo Castro denied his motion for a judgment of acquittal.¹²

The jury got the case at noon on February 10, 2023, and returned guilty verdicts on both first-degree and second-degree murder in under five hours.¹⁰⁴⁵

The Minnesota Supreme Court Appeal

Firkus appealed on two main grounds. He argued the circumstantial evidence was not sufficient to sustain the conviction because it reasonably supported an alternative explanation of a genuine struggle with an intruder, and he argued the trial court applied the wrong legal standard to his pre-verdict motions for acquittal.¹³

On February 25, 2026, the Minnesota Supreme Court affirmed the conviction in a decision written by Justice Gordon Moore. The majority held that district courts should apply the direct-evidence standard when ruling on pre-verdict motions for acquittal, even in cases built on circumstantial proof. On sufficiency, the majority concluded the proven circumstances, viewed together, supported only one reasonable inference: that Firkus killed Heidi with premeditation.¹³

Chief Justice Natalie Hudson dissented. She wrote that the trial record presented “two equally reasonable scenarios” and pointed to more than a dozen circumstances she said supported the intruder theory, including Heidi’s own 911 call, locksmith testimony that tool marks on the door lock were consistent with a burglary, FBI modeling she read as consistent with a struggle, an unidentified fingerprint on the front door screen, and the fact that Firkus never received any of Heidi’s life insurance proceeds.¹⁴ KARE 11 reported the ruling would carry “precedential impact on other Minnesota cases that rely heavily on circumstantial evidence.”¹⁵

Where Firkus Is Now

Nick Firkus is incarcerated at the Minnesota Correctional Facility in Rush City.¹⁶ After the February 2026 ruling, no further appeals or post-conviction proceedings have been publicly reported. Richman said he disagreed with the decision but announced no specific next steps.¹⁵

1
FindLaw. State v. Nicholas James Firkus
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CBS News. Heidi Firkus Fatal Shooting, Nick Firkus Trial
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ABC News. Second Wife’s Suspicions Confirmed After Husband’s Arrest for Murder
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ABC News. Husband Sentenced to Life in Prison in Wife’s Cold Case
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NBC News. Nick Firkus Murder Conviction
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ABC News. 20/20 Investigates Minnesota Woman Details Secretly Recording Nick Firkus
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Star Tribune. Nicholas Firkus Murder Trial
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CBS News Minnesota. Nick Firkus Indicted
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CBS News. Who Killed Heidi Firkus
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KSTP. Closing Arguments Expected in Trial of Man Accused of St. Paul Murder
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KARE 11. Prosecution, Firkus Defense Team Offer Closing Arguments in Murder Trial
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Star Tribune. Jury Deliberations Begin in Firkus Murder Trial
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Minnesota Lawyer. Minnesota Supreme Court Firkus Murder Conviction
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Twin Cities Pioneer Press. Nicholas Firkus Murder Conviction Appeal
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KARE 11. Minnesota Supreme Court Upholds Nick Firkus Murder Conviction
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Minnesota Department of Corrections. Offender Details