Robert Blosser of Bozeman was arrested on Wednesday, March 18, 2026, for allegedly stabbing his father several times.
Court documents state the Gallatin County Sheriff’s Office received a call from Blosser’s mother around 1:25 a.m. Wednesday saying her son had a nervous breakdown and was stabbing her husband.
When deputies arrived at the scene, they found the victim with several injuries to his hands, head, and abdomen. He was taken to Bozeman Deaconess for treatment.
According to court documents, Blosser reportedly told deputies he “lost control” and indicated "the devil" made him stab his father.
Blosser told law enforcement he had previous thoughts of killing his father and started feeling different after changing his medication; his mother told deputies she believed he suffered a psychotic break.
“The defendant’s mental health condition is a critical factor for the courts to consider, especially in the context of criminal procedure, your honor,” said defense attorney for Blosser, Coty Calvin, at a hearing on Thursday.
Blosser, 28 years old, is charged with attempted deliberate homicide.
