The Polson Police Department has requested a missing and endangered person advisory for John Andrew Winkler, a 43-year-old white male.
Winkler is listed at 6-feet-1-inches, 276 pounds with brown hair and blue eyes.
Police said he is suicidal and has mental health issues, could show violent tendencies and hallucinate due to him not taking medicine.
He was last seen wearing a white, red, and black T-shirt with red pajama bottoms. He left in a dark green 1998 Dodge Caravan with Montana plate 157964E.
It is unknown where he may be headed.
If anyone has information about Winkler, they are asked to contact Polson Police at 406-883-7301, option 1 or call 911.