Heide was last seen in Middletown Springs, Vermont on February 9, 1991. She was in the custody of the Vermont Department of Social and Rehabilitation Services at the time and was living in a foster home in Rutland City, Vermont. Heide got a weekend pass to visit her biological family in Middletown Springs and was last seen at a relative's home. Authorities believe that she left of her own accord and hitchhiked out of the area. There were unconfirmed reports that she traveled to Florida after her disappearance. Her case remains unsolved. Heide has a one-inch scar on her forehead, a scar on her left hand, a scar on her left wrist, a scar on her right leg and a dimple on her left cheek. She has a tattoo of a tiger on the back of her left shoulder and a tattoo of a rose on her ankle.