A Silver Alert has been activated after the disappearance of a Trinity County man. The last known sighting of Chester Stygar was about 6:30 Tuesday night at his home in Douglas City. He's an 81-year-old white man, 5-foot-10, about 150 pounds, with gray hair, and blue eyes. When he was last seen walking away from his home he was wearing a gray shirt, blue jeans, and a cowboy hat. Stygar suffers from medical conditions that may make him disoriented.