Mackenzie disappeared from Schofield, Wisconsin on October 11, 2015; she was last seen at her home, and vanished during the night of October 10-11. Although Mackenzie's parents wouldn't allow her to have a cellular phone and they monitored her internet usage, after her disappearance, they discovered she'd been talking online with strange men and using apps to hide her activity from her family. Police believe that Mackenzie left on her own accord and that she may be a victim of human trafficking. Her case remains unsolved. She has brown hair and brown eyes. Mackenzie may use the last name Doll; this is her mother and stepfather's last name. She wears eyeglasses with purple frames.