June 6, 2025 – Springfield, Massachusetts – Hampden District Attorney Anthony D. Gulluni announced the conviction and sentencing of Kaysone Walters, 37, of Springfield. A Hampden County jury found Walters guilty of first-degree murder in the killing of 25-year-old Brianne “Bri” Boiselle.

On Friday, June 6, 2025, the Court sentenced Walters to life imprisonment without the possibility of parole on the first-degree murder charge. On the charge of armed carjacking, Walters was sentenced to 18-20 years concurrent with the murder charge.

The verdict follows a meticulous investigation and prosecution that spanned multiple agencies and demonstrated exceptional interdepartmental collaboration.

At approximately 8:55 p.m. on August 11, 2021, the Springfield Police Department was notified of a stabbing victim on Baldwin Street in Springfield. Officers arrived on scene and found an unresponsive female victim suffering from stab wounds. Officers attempted first aid, however the victim succumbed to her injuries at the scene. The victim was identified as Brianne “Bri” Boiselle, 25, of Chicopee.

Boiselle was attending college classes in furtherance of her goal to join the medical field. She always had a backpack with her to carry her laptop to complete her coursework, and her Nintendo Switch to game with her friends on the go or at home. Evidence presented at trial showed that the defendant set Boiselle up for a robbery, lured her away from a more public meeting area, and that Boiselle resisted him in some way. She sustained 56 identifiable stab wounds and had defensive wounds to her left arm and hand. She was found face down in a small lot on Baldwin Street.

After the attack, the defendant stole the vehicle Boiselle had arrived in, drove it to Chicopee, and set it on fire. Her Nintendo Switch was later discovered inside a dresser drawer in the apartment the defendant shared with his girlfriend, alongside his wallet and ID.

Springfield homicide detectives under the direction of Captain Trent Duda identified Walters as a suspect, and on August 17, 2021, obtained an arrest warrant for Walters. At the time, he could not be found and was believed to have left Massachusetts.

Springfield detectives working with U.S. Marshals, the Hampden County Sheriff’s Department, and the State Police Violent Fugitive Apprehension Section, discovered Walters was in Lakeland, Florida. He was located and apprehended as a fugitive from justice on October 7, 2021.

The Springfield Police Department’s Homicide Unit conducted extensive interviews, canvassed neighborhoods, reviewed countless hours of surveillance footage, and processed a wide array of electronic evidence. Springfield officers also obtained critical information from companies such as Nintendo and Apple, which contributed to building a comprehensive picture of the defendant’s actions and movements.

The Chicopee Police Department and Chicopee Fire Department provided key support throughout the investigation, including hours of city surveillance footage and emergency response to the vehicle fire connected to the crime.  

The Massachusetts State Police Crime Lab played a pivotal role in identifying male DNA profile found underneath Boiselle’s fingernail, as well as the defendant’s DNA on the exterior of the front passenger side door of Boiselle’s Jeep.

Hampden District Attorney Anthony D. Gulluni said, “This was a calculated and deeply violent act that ended the life of a young woman with her future ahead of her. We are grateful to the jury for their careful consideration and for delivering a verdict that brings justice to all who knew and loved Bri.”

Gulluni added, “I want to thank Assistant District Attorneys Max Bennett, Kerry Koehler, and Michael Locke for their thorough casework and determination from start to finish. I’d also like to thank Victim Witness Advocates Jane Chevalier and Kristin Welch, whose compassion and support guided the victim’s family through an incredibly difficult process.”