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 28^th 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.