Aidan R. Knowles was 18 when he was last seen in Brier, Washington, on March 24, 2016. He is described as a white male with brown hair and brown eyes, about 5 feet 8 inches tall and weighing between 150 and 175 pounds.

His disappearance was sudden and unexplained; there has been no communication from him since he was last seen and no public details about what he was wearing or his state of mind that day.

Does anyone in the Brier area remember seeing Aidan around March 24, 2016, or have information that could help investigators?