|Spoiler — Plot or ending details follow.|
|Birthdate||September 29, 1935|
Mr. Sheppard is the alcoholic father of John Sheppard, and the brother of John who later becomes the Origami Killer. In Twins, John and his brother are forced aggressively out of their house. John and his brother play games so they won't be bored, such as playing on a construction site and then later playing hide-and-seek. Eventually, John's brother begins counting for hide-and-seek, where which he finds John stuck in an open water pipe drastically filling with rain water. John's brother goes to Mr. Sheppard asking him to save John, but he cowardly refused. It is this trauma that causes John's brother to become the Origami Killer. His MO is to kidnap a 9- to 13-year-old boy, then put that boy's father through a series of Trials, where the consequence of failing the trials will cause the child's death by drowning.
He is also the husband/ boyfriend of Ann Sheppard.