The 31-year-old son of opera singer Jubilant Sykes pleaded not guilty to murder and other crimes Thursday in the Grammy-nominated artist's stabbing death at the family's Santa Monica home. Stream Los Angeles News for free, 24/7, wherever you are. WATCH HERE WATCH HEREProsecutors alleged that Micah Sykes used a dagger, garden shears and barbell in the Dec. 8 attack. Jubilant Sykes, 71, was pronounced dead at the scene of the crime, where his son was found and taken into custody. He has performed with the Los Angeles Philharmonic and other orchestras.