The St. Clair County Sheriff’s Office is asking for the public’s help in locating a missing, mentally impaired man. Christopher Matthew Amsden was last seen since being dropped off at the Marysville Library on November 28th in the early afternoon. Amsden is approximately 6’ 0” tall, weighs about 180 pounds and was last seen wearing khaki pants, a dark jacket and a brightly colored scarf. It is unknown where Amsden may be headed. If anyone sees Christopher Amsden, please contact the St. Clair County Sheriff’s Office at (810) 985-8115, or your local police agency. Amsden is listed as missing endangered.