Dangerous offender on trial for murder of Ont. couple: Canadian Press Toronto David Alexander Snow has been committed to trial to face first-degree murder charges in the slaying of a Toronto couple. Snow, a former resident of Orangeville, Ont., is charged with the murder of Ian and Nancy Blackburn at their farm northwest of Toronto in April 1992. Ian Blackburn, 54, a real estate agent, was asphyxiated while his wife, Nancy, 49, a public health nurse, was strangled, autopsies showed. Snow was remanded in custody and is to appear in court on Dec. 21 to set a date for trial. - Times - Colonist (Nov 8, 1994)