A Florida dispatch centre acknowledges an "error" was made shortly after a Toronto-born law professor was shot in his car in his garage.
The dispatch supervisor says a Tallahassee 911 operator failed to initially tell police that Daniel Markel had actually been shot.
It was 19 minutes before help arrived after a neighbour made the emergency call. Markel died later in hospital.
Police believe Markel was the intended target of the shooting. The investigation continues.