Longtree Sentenced For Sexual Assault

A Poplar man who sexually abused a minor on the Fort Peck Indian Reservation was sentenced last week to 40 months in prison to be followed by six years of supervised release, U.S. Attorney Kurt Alme said.

Chandler Duran Longtree, 19, pleaded guilty in September 2025 to one count of sexual abuse.

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

The government alleged in court documents that on Jan. 18, 2025, Jane Doe was drinking with a group of young people. She eventually separated from her friend and went with the defendants, Longtree and Payton Montclair, both 18 at the time, went to Longtree’s house. While at the house, she was sexually assaulted by Longtree and Montclair. Doe reported the assault and underwent an exam from a sexual assault nurse examiner, which revealed evidence consistent with a sexual assault.

Assistant U.S. Attorney Kalah Paisley prosecuted the case. The Federal Bureau of Investigation and Fort Peck Tribes Department of Law and Justice conducted the investigation.