Little is known about Harrison, other than he married Jackson's mother Rosemary. After she died, Harrison began to abuse Jackson by beating him, forcing him to cross-dress, and is even implied to have abused him sexually. Eventually Jackson was removed from Harrison's custody and placed in a foster home.
Harrison and Jackson meet again when he was staying at the Corpus Christi. He holds Harrison at knifepoint and tied up with a plastic bag over his face.