Friday, August 21, 2026
87.0°F

Police deem Mother’s Day killings in Kalispell a murder-suicide

DERRICK PERKINS | Hagadone News Network | UPDATED 1 year, 3 months AGO
by DERRICK PERKINS
NEWS EDITOR Derrick Perkins serves as News Editor at the Daily Inter Lake. He oversees daily news coverage and works closely with reporters to plan, edit and publish stories across print and digital platforms. Perkins helps coordinate coverage of local government, public safety, business and community developments throughout Northwest Montana. He works with the reporting staff to strengthen journalism while maintaining consistent daily coverage. His role helps ensure the newsroom delivers timely, accurate reporting that readers rely on. IMPACT: Derrick’s work keeps readers informed about the decisions and events shaping their communities every day. | May 12, 2025 1:10 PM

Investigators believe 33-year-old Nicholas Olson-Hartley shot his wife and two young children in their North Kalispell home on Mother's Day in an apparent murder-suicide.  

Kalispell Police officers arrived at the family's Werner Peak Trail home about 5:52 a.m., May 11 after dispatchers received a call from Olson-Hartley, who officials said made several "concerning statements" before hanging up.  

Unable to contact anyone inside, officers broke into the home, where they first discovered the bodies of Nicholas Olson-Hartley and his wife, 27-year-old Katie Olson-Hartley, both shot to death, officials said.  

The bodies of the couple's two children, one 6 years old and the other 7 months old, were found during a search of the home, according to the authorities. They, too, died from apparent gunshot wounds. 

Based on interviews and evidence collected, investigators determined that Nicholas Olson-Hartley killed his wife and children before calling 911. After hanging up on dispatchers, Nicholas Olson-Hartley killed himself, officials said.   

The couple's eldest child, Heidi Hartley-Olson, attended Edgerton Elementary School in Kalispell. The 6-year-old was a "kind, thoughtful, and a bright light at Edgerton, and she will be missed," wrote Superintendent Matt Jensen in a letter to parents on Monday. 

The district set up a crisis response team to aid students, parents and school personnel in the wake of the tragedy, Jensen wrote. Counselors are available at Edgerton for students and parents can expect to be contacted if their child appears to be struggling "so the conversation can continue in your presence," he said.  

Teachers were informed of the killings before the start of the school week "to support them personally, and prepare for your children to arrive this morning." 

Jensen also urged parents to contact the school if their children need additional support. 

"Our goal is to help our school community process any loss or tragedy with compassion, respect, and care," he wrote. 

News Editor Derrick Perkins can be reached at 758-4430 or [email protected].


ARTICLES BY DERRICK PERKINS

August 14, 2026 9 a.m.

Motorist accused of hitting flagger in Whitefish construction zone

A Whitefish motorist suspected of running over the foot of a construction zone flagger in June is now up on a felony charge.

Serio given 100-year sentence for killing a man with his car in 2025
August 12, 2026 2 p.m.

Serio given 100-year sentence for killing a man with his car in 2025

Convicted murderer Jeffrey Scott Serio received a 100-year prison sentence Wednesday for intentionally running over and killing a Flathead Valley man in the summer of 2025.