An aspiring Toronto rapper has been found guilty of four counts of first-degree murder in the 2010 shooting deaths of four men. Mark Moore pleaded not guilty to all four of the murders, which took place over a span of 75 days in the fall of 2010. The jury came back with their verdict around 6 p.m. Saturday. Moore is convicted of first-degree murder in the shooting deaths of Jahmeel Spence, Mike James, Courthney Facey and Carl Cole. Two of those killings were witnessed by a friend of Moore, who provided key testimony at the trial. Moore is currently serving a 12-year sentence for a violent Toronto robbery. Moore will be sentenced on June 16.