Mary Ann Williams, 32, was last seen June 1, 1995, in Palestine, Texas, after attending a party where an altercation occurred. She left the gathering and was never heard from again; her disappearance was not reported until September 1995. Authorities consider the circumstances suspicious and suspect foul play.

Mary had several distinctive physical features: scars on her nose, elbows, upper left arm, left shoulder, and right wrist, discolorations on her left leg and back, hypodermic needle marks on her right arm, and a recent fracture of her right arm prior to going missing. She was known to use the aliases Mary Williams Silva and Diane Shepherd.

The case remains unsolved. Anyone who knew Mary, attended that June 1 gathering, or has information about her whereabouts is asked to contact the Texas Department of Public Safety or local investigators.