Who killed Kristil Krug? Slain Colorado mom received menacing threats weeks before her murder.
The chilling discovery of Kristil Krug’s lifeless body in her suburban Broomfield, Colorado, garage on December 14, 2023, sent shockwaves through her community and ignited a desperate search for answers. Her husband, Dan Krug, returning home from work, was met with the devastating news, his anguish palpable as victim advocate Heather Aites stood by, trained to navigate the raw landscape of emotional agony. "It’s a weird feeling standing there when somebody is being told, ‘I’m sorry, but your loved one has died,’" Aites recounted, observing Dan’s initial distraught reaction.
From the outset, Aites noted a peculiar detail that would soon become central to the unfolding tragedy: "This man has been going through a stalking case with his wife… he is being stalked as well. And now she is gone." As investigators began meticulously combing the crime scene for clues, Aites drove Dan to the police station, his form hunched over in the passenger seat, seeking comfort in her reassuring touch. His immediate concern, Aites observed, was for his three young children, then aged 16, a testament to the couple’s 16-year marriage. He was insistent on being the one to break the heartbreaking news to them.
Under the vigilant command of Broomfield Police Chief Enea Hempelmann, officers immediately launched into interviews, canvassing neighbors, and gathering preliminary information. Hours after his emotional arrival at the station, Dan Krug, now seemingly composed, recounted his morning routine to detectives. He stated that he and Kristil, both 43, had seen their children off to school, and Kristil appeared fine when he left for his job at the Colorado Department of Public Health and Environment. A text message from Kristil later that morning, asking him to pick up one of their children, struck him as unusual when his reply went unanswered. "And that… that was weird," he told detectives, explaining why he had called the police to conduct a welfare check.
What Officer John O’Hayre found upon arrival was a scene of horror. Peering through the garage window, he immediately saw Kristil, "apparently lifeless," with a visible head wound. For Kristil’s parents, Lars and Linda Grimsrud, the news was a parent’s worst nightmare. They painted a picture of their daughter as a vibrant, intelligent woman—an engineer with exceptional skills in math, science, and the arts, who loved life and spent countless hours working on classic muscle cars with her father in his garage. This shared passion was also where Kristil had, just weeks before her murder, confided in her father about her terrifying ordeal.
Kristil Krug Tells Police She is Being Terrorized by a Stalker
In the fall of 2023, Kristil revealed to her father that she was living in intense fear, a fear born from a relentless stalker. "She sat here and told me that she was being stalked and that just shocked me," Lars Grimsrud recalled from his garage, the place where Kristil once found solace. She had already contacted Broomfield Detective Andrew Martinez, relaying her story "without hesitation," a conversation that was recorded. "I keep trying to remind myself, this is intending to be terrorizing. This is intending to scare me," Kristil told Martinez, detailing the chilling messages.
The ordeal began on October 2, 2023, with an unsettling text from someone named "Anthony" inquiring about a "hook up." Kristil did not respond. The next day, more texts followed, laced with obscenities and a disturbing command: "you should kill urself. Dont waste my time." Martinez noted the extreme escalation, interpreting it as "a pretty extreme reaction to not getting a response." Kristil suspected her ex-boyfriend from high school and college, Anthony Holland, who she had dated for about a year around 2000. Her parents remembered Holland as friendly and courteous, but Kristil recounted his persistent attempts to contact her over the years via Facebook, even after she told him to stop and deleted her account.
The 2023 texts, however, were different. "This was alarming. He’s never said this kind of stuff to me before," Kristil explained. Over the next two months, the messages intensified, including threats against her and Dan. A particularly disturbing photo of Dan getting out of his car at work, sent to Kristil, prompted her to finally contact the police. Days later, another message: "Saw u at dentist… see you soon." This confirmed for Martinez that the stalker was likely surveilling them both. "This now is escalating," Kristil told the detective, describing the constant harassment that made her feel "every corner presents some sort of danger."
Martinez faced the slow bureaucratic process of obtaining search warrants from phone and email companies to gather evidence and locate Anthony Holland. Kristil, losing patience, hired a private investigator who tracked Holland to Utah, some 500 miles away. She shared this information with Martinez, who, however, opted not to contact Holland immediately. His strategy was to gather enough evidence for an arrest warrant, ensuring Holland could be taken into custody without delay. Kristil, however, felt "abandoned," believing the police weren’t acting aggressively enough.
In her increasing fear, Kristil took matters into her own hands. She installed security cameras and, at her father’s urging, began carrying a gun for protection – the very gun Lars Grimsrud identified as the one she took. Dan Krug, too, expressed distress to detectives, admitting he "f** panicked" at a dropped can in a grocery store, feeling he was doing "a s*** job of protecting my wife." He even gave the stalker a nickname: "Kickman," derived from an email address associated with the threats: "ahollandkicks@gmail.com."
As the weeks dragged on, Kristil’s family witnessed her descent into despair. "It was just heartbreaking. She was just in tears… She was just like, what am I gonna do? How am I gonna live?" Linda Grimsrud recalled. Kristil confided in her siblings, Jenna Ericson and Josh Adamson, that she was "terrified," even expressing a grim premonition: "She said, it’s either going to be me or him that’s dead. And I’m going to do everything in my power to make sure it’s not me."
Police Zero in on Kristil Krug’s Stalker
When Kristil Krug was found murdered, Detective Martinez’s initial assumption was clear: "My initial assumption was that… Anthony Holland had… gone to her home and murdered her." Within hours, local police descended on Holland’s home in Eagle Mountain, Utah. Holland described the sudden, intense "pounding at the door" by eight officers. He confirmed knowing Kristil as his "very first girlfriend ever" but claimed their last contact was years ago, around 2014 or 2016, via Facebook. He was unaware of her murder.
Police questioned Holland about his whereabouts on the day of the murder. He produced a receipt for a sweatshirt purchased at a Kohl’s store near his home at 12:16 p.m. Kristil was attacked around 8 a.m. "It turns out that was one of the most important purchases you have ever made," Peter Van Sant noted to Holland. "Because it was my alibi," Holland explained, "there is no way I could have made it from Colorado back to Utah to buy the sweatshirt. It was an eight-hour drive." Employment records further corroborated his alibi, proving he had been in Utah all along. Satisfied, the officers released him.
Back in Colorado, Dan Krug continued his interview with investigators, offering a theory of the crime: "So in my brain, the story that I have is someone came to the door, maybe she went outside to get a package and they must have come in. And she’s… she is strong. She would’ve fought." He maintained his desire to tell his children what happened, a request he had made earlier.
Meanwhile, investigators had discovered critical information. The security cameras Kristil had installed on the house, including the doorbell and side cameras, had been manually turned off. Only one Nest camera near the garage remained active. More significantly, digital forensic examiner Randy Pihlak of the Broomfield Police Department, now working with expedited requests, made a breakthrough. Messages from two accounts used to harass Kristil were traced to the same IP address: the Colorado Department of Public Health and Environment – Dan’s workplace.
The revelation was staggering. "The entire air was just kind of evacuated out of our investigations room and we realized… we need to focus on Dan and where he’s been and what he’s been doing," Martinez recounted. Confronted by Martinez and Detective Jennifer King Sullivan, Dan Krug clung to his "Kickman" theory. "I think it’s Kickman. I think it’s Anthony," he insisted. When informed that Anthony Holland had been eliminated as a suspect, Dan’s demeanor shifted. "Then I have nothing. And, then I’m f** terrified to bring my children home," he stated, feigning ignorance and fear. However, the detectives observed a defensive posture – crossed arms, leaning back – signaling a shift from grieving husband to potential suspect.
Dan Krug Goes From Grieving Husband to Murder Suspect
Dan Krug calmly denied any involvement, even as the detectives pointed out the glaring inconsistencies. "I loved her… there has to be someone else. But I don’t know who that is," he reiterated, his stoicism striking Martinez and King Sullivan. "He had no reaction, um, and really no explanation," King Sullivan observed. Dan continued to claim he had no "narrative or a story" to offer, despite the evidence mounting against him.
The autopsy revealed a brutal attack: Kristil was bludgeoned from behind with a blunt object, then rolled over and stabbed "just above her heart." As Dan became the prime suspect, detectives delved into his relationship with Kristil. Her parents confirmed it was deeply troubled, especially in the "last few months." Linda Grimsrud revealed, "She said, well, I’m sleeping on the couch mom." They described Dan’s "fiery temper," often triggered when he felt he was "losing control." Kristil’s sister, Jenna Ericson, recalled his face turning "really red when he was getting frustrated." More critically, Kristil’s parents disclosed that she was preparing to leave Dan, seeking a divorce.
Digital forensic expert Randy Pihlak uncovered more damning evidence from Dan and Kristil’s phones. The text message Dan claimed Kristil sent him while he was driving to work, asking about picking up a child, was found to have been pre-programmed using a new phone feature. "Who do you believe preprogrammed those messages?" Van Sant asked Pihlak. "Uh, Dan Krug," he replied, adding, "To hide his actions." Pihlak believed these messages were set before Dan left the house, while Kristil was already deceased, creating a false alibi that she was alive and texting him after he departed.
Even more incriminating were Dan’s internet searches from the day before the murder: "What happens when you’re knocked unconscious?", "Do people really go unconscious when hit in the head?", and "How hard for head trauma to go unconscious?" "All searches were the day before the murder… it was rather damning," Pihlak concluded.
Just two days after Kristil’s murder, Detectives Martinez and King Sullivan had enough evidence. They tracked Dan Krug to a grocery store parking lot. "Probably eight cars… we quickly converge on his car," King Sullivan described the dramatic arrest. Surrounded, Dan was pulled from his vehicle and informed he was being arrested for his wife’s murder. Martinez delivered a poignant question, referencing Dan’s earlier desire to tell his children the news: "Do you want to tell your kids that you killed their mother, or do you want somebody else to?" Dan, now silent, requested an attorney.
For Kristil’s parents, the arrest brought immense relief. "Guilty, guilty, guilty, guilty," Lars Grimsrud remembered feeling.
Kristil Krug’s Final Moments Revealed
Deputy District Attorneys Kate Armstrong and Stephanie Fritz took on the prosecution, stunned by Dan Krug’s audacious attempt to frame Anthony Holland. "The audacity with which he thought he could manipulate not only his family, his loved ones, but also the police department," Armstrong stated. Fritz acknowledged the scheme’s "sophisticated" elements but emphasized their ability to "figure it out."
The trial began in April 2025. Lars Grimsrud recounted Dan’s unsettling smile towards him in the courtroom, a smile quickly met with Lars’s cold glare. The prosecution meticulously laid out Kristil’s final hours. On December 14, 2023, after dropping her younger children at school, Kristil returned home, pulling into her garage. "When she is attacked from behind," Armstrong detailed. "It was an ambush," Fritz confirmed, citing the "two or three skull fractures." As Kristil lay bleeding, Dan pushed her over and "stabs her… just above her heart." Armstrong attributed this final, vicious act to "rage," a desire for "control and power that he wanted to exert over Kristil."
The prosecution’s theory was that Dan orchestrated the stalking campaign, impersonating Holland, hoping to drive Kristil closer to him, to see him as her heroic protector. When this manipulation failed, and Kristil began to suspect him, the situation escalated fatally. "She confronted him and said, ‘I can’t rule you out as the stalker,’" Fritz revealed from Dan’s own interview. "He was going to lose Kristil anyway… He was going to be exposed as the stalker," she explained, leading to the murder.
The fabricated alibi of the delayed texts was a key piece of evidence. "Were we not able to discover that that was a delayed send text, it would have appeared as though Kristil was still alive when he left the house," Armstrong emphasized. The internet searches, threatening messages, and emails were all presented. A particularly damning piece of evidence was the photograph of Dan arriving at work, sent to Kristil as if from Holland. Randy Pihlak testified that Dan himself took the selfie using a timer. Armstrong highlighted this in her closing argument, "The defendant took this photograph and then he sent it to his wife."
Defense attorney Phillip Geigle argued that the investigation was flawed, pointing out that the murder weapons – the blunt object and knife – were never recovered, and Kristil’s phone was not tested for fingerprints or DNA. "Well, you won’t know if you won’t try," he challenged. Geigle also asserted that forensic tests on Dan’s clothing and car found "no blood" and "no physical evidence." "There is absolutely no physical evidence on Mr. Krug’s clothing… There’s no blood found on that car inside or out," he stated, gesturing towards Dan Krug as "that idiot right there."
After a day and a half of deliberations, the jury returned with verdicts. Judge Priscilla Loew read them: "We, the jury, find the defendant guilty of murder in the first degree… guilty of count number two, stalking, extreme emotional distress." Dan Krug was also found guilty of stalking with credible threat and criminal impersonation. "Guilty, guilty, guilty, guilty. And at that point I think I started breathing again," Lars Grimsrud recalled, his relief profound. Krug was sentenced to life in prison without parole for the murder, plus an additional nine and a half years for the other charges.
Even after his conviction, Dan Krug maintained his innocence in video calls from jail, claiming the jury "never produced a single piece of hard evidence" and that the real killer remained at large, endangering his children. His brother, Jeremy Krug, however, delivered a dose of reality: "Support is dwindling… There’s a lot that’s come out… the reality, um, some of it is beyond even my creativity."
Could Kristil Krug’s Murder Have Been Prevented?
The tragic case raised a critical question: could Kristil’s murder have been prevented if Detective Martinez had contacted Anthony Holland earlier? Holland believed so: "They should have found me right away… They should have talked to me." Martinez, haunted by the outcome, admitted his regret: "This case has… haunted me for the past two years." If given a time machine, he said, he would "absolutely" make that call.
Kristil’s parents, however, sympathized with Martinez, believing their daughter was doomed regardless. "Inevitably, I think he was gonna kill her… I don’t think that would’ve stopped the murder from happening," Lars Grimsrud stated. Kristil’s death has left an irreplaceable void. Anthony Holland, her "first love," still feels her absence deeply: "I’ve had lots of other girlfriends and I’ve never been in love with anybody else like her."
Jenna Ericson hopes her sister’s story will serve as a stark warning. "If it can help just one other person, who’s in a dangerous situation, like she was in, that it gives them the strength to make a move because it can escalate and it can escalate really, really fast." Linda Grimsrud mourns "Her light, you know, her light," while Lars cherishes the memory of her joyous "hey Papa" greeting.
Lars continues his work on vintage cars, a hobby he now shares with Kristil’s children, honoring her memory. "She, uh, she would get such a kick out of seeing the kids doing the stuff that she was involved in," he said. Linda finds solace in her grandchildren, "because I see her." The family has launched an online fundraising campaign to support Kristil’s three children, ensuring her legacy of love and light endures beyond the darkness of her tragic end.
