Two young men sentenced to decades for Frazee homicide

Arthur Deshun Campbell was sentenced to 40 years in prison, and Kayne Noble Mackner received a three-decade term, bringing a hard close to the Frazee homicide case that left 19-year-old Bryson Andrew May dead and shook the communities around Frazee, Detroit Lakes and Perham.

The case began before dawn on Dec. 20, 2025, when Becker County deputies were called at 2:38 a.m. to 701 W. Ash Ave. in Frazee for a disturbance, then reports of shots fired. Four suspects fled in a black SUV, and law enforcement later detained all four occupants north of Perham. May was later pronounced dead after life-saving efforts at the scene, and the Ramsey County Medical Examiner ruled his death a homicide caused by multiple gunshot wounds.

Investigators said the group had traveled from Hawley to Frazee to collect a debt but went to the wrong house, a detail that turned the case into a home invasion tied to a robbery attempt. That sequence of events, from the first 911 call to the flight in the SUV, kept attention fixed on the case across Becker County and into Otter Tail County, where families and schools recognized how close the violence came to ordinary neighborhood life.

Judge Michelle W. Lawson imposed Campbell’s sentence in Becker County District Court. Campbell was convicted of second-degree murder, second-degree assault with a dangerous weapon and soliciting juveniles to commit a felony. He was ordered to pay $6,567 in restitution, received credit for 151 days already served and will serve his sentence at the Minnesota Correctional Facility in St. Cloud.

Mackner, who accepted a plea deal in February 2026 and agreed to be charged as an adult on second-degree murder charges, had already positioned himself for a long prison term. Prosecutors had recommended up to 35 years. A third suspect, Cash Mathieu, 17, of Perham, was later charged as an adult with first-degree aggravated robbery and aiding an offender to avoid arrest for allegedly driving the group to Frazee.

The Becker County Sheriff’s Office said early in the investigation that the incident appeared isolated and posed no further threat to the public. Frazee Police, Frazee Rescue, the Minnesota Bureau of Criminal Apprehension, the Otter Tail County Sheriff’s Office and Essentia St. Mary’s EMS all assisted at the scene, where one violent encounter on a Frazee street ended with decades-long prison terms for two young men and a homicide case that has now moved from fear and speculation to sentencing and consequence.