Zachary Andrew Turner (18 July 2002 – 18 August 2003) was a boy from St. John's, Newfoundland, Canada, who was murdered by his mother, Shirley Jane Turner, in a murder–suicide. At the time, Shirley had been released on bail and awarded custody of the infant, even though she was in the process of being extradited to the United States to stand trial for the murder of Zachary's father, Andrew David Bagby. The case led to a critical overview of Newfoundland's legal and child welfare systems as well as Canada's bail laws.