Browning man sentenced to over 15 years in prison for multiple assaults

GREAT FALLS - A Browning man who over a three-year period separately assaulted 2 different individuals and sexually abused a woman was sentenced today to 188 months in prison to be followed by 10 years of supervised release, Acting U.S. Attorney Tim Racicot said.

A jury found Kevin James Trombley, 28, guilty of one count of aggravated sexual abuse and one count of assault resulting in serious bodily injury in October 2025.

A separate jury found him guilty of one count of assault resulting in serious bodily injury, one count of assault with a dangerous weapon, and one count of use of a firearm during a crime of violence in March 2026.

Chief U.S. District Judge Brian M. Morris presided.

The government alleged in court documents and at trial in October 2025 that in June 2022, Trombley and Jane Doe were both at a house party outside Browning at the home of mutual family members. Late that night as the rest of the house slept, and while Doe was trying to make her way to bed, she encountered Trombley in the kitchen. There, he used force against Doe, pushed her into the bathroom, and engaged in non-consensual sex. Doe escaped the bathroom and immediately reported the assault.

Law enforcement officers responded to the scene and interviewed Trombley. He denied having any contact with Jane Doe, then recanted and admitted being in the bathroom with her but only for a moment. He denied having any sexual contact with her.

In July 2023, Jane Doe's father saw Trombley at a rodeo in Browning, Montana. He approached him and told him something to the effect that he was going to prison for what he did. Trombley assaulted Jane Doe's father, hitting him so hard he sustained a head injury and required a medical procedure to repair the injuries to his face.

The government alleged in court documents and at trial in March 2026 that John Doe was drinking with friends and family in the late hours of March 22, 2024, and early hours of March 23. Early in the morning on March 23, Trombley and some friends entered the same residence without permission.

Once inside, a fight broke out between Doe, Trombley, and others. After the fight caused damage, the homeowner ordered everyone to leave and grabbed a pellet gun to make her point.

The fight migrated outside into the driveway that abuts the house. Trombley retreated to his truck that was parked on the street. Doe, meanwhile, stood in the driveway. According to witnesses, Doe was unarmed and had his hands up, saying something to the effect of, "What are we going to do?"

At that point, Trombley-who was seated in the driver's seat of his truck-leaned across the passenger seat and fired a gun through the truck's window. The shot hit Doe in the abdomen, and he fell to the ground. Trombley fled in his truck. Doe was taken to Blackfeet Community Hospital before he was transferred to Benefis Hospital in Great Falls, where he underwent surgery for injuries to his internal organs. Law enforcement spoke with several witnesses who identified Trombley as the shooter.

Law enforcement went to a residence in search of Trombley. They found him sleeping in a back bedroom, and they found a Smith & Wesson 40 caliber pistol-later confirmed to have been purchased by Trombley-between the box spring and the mattress on which he slept. When Trombley's truck was later searched, officers found a spent shell casing on the passenger side floorboard. When law enforcement interviewed Trombley, he did not deny being at the party but denied knowing how Doe was shot.

The U.S. Attorney's Office prosecuted the cases. The FBI and Blackfeet Law Enforcement Services conducted the investigation.

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