CALGARY -- Police say a man wanted for second-degree murder in connection with the stabbing of man who stepped in to stop a fight has likely left the city. A Canada-wide warrant has been issued for Antoine Joel Gros Venture Boy, 26, the suspect in a fatal stabbing in downtown Calgary on June 30. That night, around 7 p.m., 62-year-old Paul March was walking by James Short Park at 115 Fourth Ave. S.W. when he heard a woman asking someone to stop hitting her. March confronted the man, who threatened him with a knife. Turning to run, March tripped on the bumper of a car at Fifth Avenue and Centre Street, and fell.