Authorities are seeking help finding a man missing from the Shepherd area since Monday.Richard Martisch, 67, is 6 feet 2 inches tall with a short grey beard. He was last seen wearing khaki Carhart pants, a black vest and flannel shirt. He was a Crocodile Dundde style hat and was with a dog when he was last seen, but the dog has since returned.He is known to have mental health-problems.Yellowstone County Sheriff Mike Linder said searchers are in the area of 11842 C A Road near Shepherd.Anyone who may have seen him or with information is asked to call the sheriffs office at 406-256-2929. ...read more read less