Portland

Suspect in 2023 Portland Homicide Arrested in Missoula after Two-Year Manhunt

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Published on October 14, 2025
Suspect in 2023 Portland Homicide Arrested in Missoula after Two-Year ManhuntSource: Portland Police Bureau

Following a prolonged manhunt spanning two years, the individual suspected in the 2023 killing of Tiara Atencio has been apprehended in Montana, authorities announced. Connor J. O'Brien, a 21-year-old man linked to the homicide, was taken into custody in Missoula, MT. by the Montana Regional Violent Crimes Task Force, with the assistance of the Missoula Police Department. This development was brought forth in a news release from the Portland Police Bureau.

O'Brien is currently held at the Missoula County Jail, facing charges of Second Degree Murder and Unlawful Use of a Weapon. According to the same source, his arrest occurred on Monday, October 13, just a day before this revelation to the press. The victim's family has been notified of the latest developments, which for many brings a semblance of progress in a case that remained unresolved for far too long.

The tragic incident back in October 2023 extinguished the life of Atencio, whose absence has since left a void in the hearts of family and friends. As the legal proceedings commence, the community and those who knew Atencio may begin to find a measure of solace in the pursuit of justice, though the pain of loss endures.

Details about O'Brien's extradition are yet forthcoming, but for now he awaits legal proceedings in Montana. Local authorities and the Montana Regional Violent Crimes Task Force are coordinating with Oregon officials to manage the complexities of the case.