Robert Anthony Biela was 36 when he was last seen in Harlingen, Texas, on September 4, 1986. He was reported missing under concerning circumstances and classified as endangered because he was disabled. At the time he disappeared he was wearing a t-shirt, blue jeans, and flip-flops.

He was described as between 5 feet 4 inches and 5 feet 7 inches tall, about 130 pounds, with brown hair, brown eyes and a birthmark on the left side of his lips. Authorities including the Texas Department of Public Safety investigated but no significant leads have emerged and the case remains unsolved.

Anyone who knew Robert, saw him in Harlingen around September 4, 1986, or has information that could help locate him is asked to come forward.