2-year-old Thomas was last seen on March 18, 1991 in Glendale, Oregon.
He was last seen playing in the backyard of his house. Thomas' father, former Douglas County deputy sheriff, Larry Gibson was convicted of second degree manslaughter in 1995 for murdering Thomas, but released in 1996 after serving his sentence. He still maintains that he is not involved in his son's disappearance.
Thomas has not been seen since. He was last seen wearing a purple sweatshirt, gray pants, and black & white-checkered sneakers. He has a gap between his front teeth.