Santa Cruz authorities are asking for the public’s help today, locating a 73-year-old man who went missing this week. William Donald Moritz walked away from his Live Oak home on Tuesday, and was last seen near a Live Oak beach later that day. Moritz suffers from a disease which affects his memory, however the condition may not be obvious to casual observers. William Donald Moritz is described as 6-foot-3, between 200 and 225 pounds, has receding gray hair in a pony-tail and a 4 to 5 inch long white beard. Anyone who sees him is asked to call 9-1-1.