Mark Herbert Thornton, a 63-year-old resident of Milpitas, California, went missing on March 7, 2019. He left his Coelho Street home around 11:30 a.m. and was last seen walking on foot. Thornton was considered at risk because he needs medication for several medical conditions, including blood pressure, and those medications were left at home.

On the morning he disappeared he had discovered the household account was overdrawn and spoke with his wife about their finances. She left for about an hour; when she returned he was gone. He had prepared for the evening by laying out pajamas and washing dishes. His phone was turned off and there has been no contact since. He is described as 5 feet 9 inches, 164 pounds, with graying black hair and blue eyes; last seen wearing a red vest, black jeans and gray hiking shoes. Authorities and search and rescue teams have conducted searches and the case remains open.

If anyone saw Mark Thornton on March 7, 2019, or has information about his movements that day, please share what you know.