New York (AFP) - The New York trial over the murder of Jam Master Jay, the influential Run-DMC DJ who was killed two decades ago, is set to begin in earnest Monday with opening statements.  The trial, to be decided by a jury in a federal district court, is centered on the events of October 30, 2002, when the pioneering rap music star Jason "Jay" Mizell was fatally shot in the head in his studio in the New York borough of Queens. He was 37 years old and a father of three. The infamous murder remained a cold case for nearly two decades, in limbo until federal prosecutors in August 2022 announced...