MIDDLESEX COUNTY, Va. (WRIC) -- A missing 80-year-old man last seen in Middlesex County on Tuesday could be in danger, according to Virginia State Police. The critically missing alert was issued by state police on behalf of the Middlesex County Sheriff's Office the night of Tuesday, Oct. 22. According to state police, 80-year-old Marshall Brownley Forrest, Jr. was last seen on Belle Aire Drive in the Hardsyville area around mid-afternoon on Tuesday. His disappearance poses a credible threat to his health and safety, according to authorities. Forrest, pictured below, is described as a white man with white-grey hair and brown eyes. He is said to be about 5'11" tall and weigh about 174 pounds. State police said he has a scar on his left knee from a previous knee replacement surgery. Marshall Brownley Forrest, Jr. (Photo: Virginia State Police) Forrest may have been wearing a t-shirt, blue jeans, a yellow gold wedding band and tennis shoes at the time of his disappearance. He is not wearing a jacket. According to state police, Forrest may be driving a silver 2018 Toyota RAV-4 SUV. A stock photo of this make and model of vehicle is shown below. The license plate on Forrest's vehicle reads DDQ-284. A stock photo of a silver 2018 Toyota RAV-4 SUV. (Photo: Virginia State Police) If you see Forrest, call 911. If you have any information on his whereabouts, you can contact the Middlesex County Sheriff's Office at any time by calling 804-758-2779.