Poplar Man Sentenced For Aggravated Sexual Assault
A Poplar man who strangled and sexually assaulted a teenage girl was sentenced today to 120 months in prison on one count of aggravated sexual abuse and 120 months on one count of commission of a sex offense by a registered sex offender. The two sentences will be served consecutively. He was also sentenced to a lifetime of supervised release, Acting U.S. Attorney Mark Steger Smith said.
Arthur Dion Longee, 38, pleaded guilty in December to the two charges.
The government alleged in court documents that Longee, who had previously been convicted of a sex crime in 2013, repeatedly strangled and sexually assaulted a teenage girl after spending the day drinking alcohol and smoking meth with her and a friend.
On Jan. 22, 2025, Longee brought a 17-year-old girl and her friend over to his grandmother’s house in Poplar to smoke meth and drink alcohol. Later in the day, after dropping off the friend at her apartment, Longee and the 17-year-old girl returned to his bedroom.
The girl was on her tablet and Longee got angry, strangling her to unconsciousness. She regained consciousness before Longee strangled her again. When she awoke each time, she was in various stages of undress. At one point during the assault, she coughed up blood. She said Longee told her, “I’m sorry, babe. Am I scaring you?”
The girl cried and asked to leave, but Longee wouldn’t let her, instead telling her that she was with him tonight. When she told him again that she wanted to go home and was scared, he again got angry, yelled at her and sexually assaulted her again. After another assault in the living room, the 17-year-old was able to escape through the kitchen and run to a friend’s house where the friend called 911.
At the hospital, the girl was interviewed by law enforcement, who obtained a search warrant for the Longee residence. They found Longee there, passed out on the floor and the house exactly as described by the girl. Agents awakened Longee, arrested him and swabbed him for DNA. At the hospital, the 17-year-old was evaluated by a sexual assault nurse examiner, who found injuries, bruising and other evidence of the assault.
Chief U.S. District Judge Brian M. Morris presided. The U.S. Attorney’s Office prosecuted the case. The Fort Peck Tribes and the Federal Bureau of Investigation conducted the investigation.

