variety.com – Chris Morris – Singer-songwriter-guitarist Chuck Berry, the rock ‘n’ roll pioneer who established the form and the themes of the music with his slyly funny, rhythmically propulsive ’50s hits, such as “Maybellene,” “Roll Over Beethoven” and “Johnny B. Goode,” has died. He was 90. St. Charles County police responded to call placed at around 12:40 p.m. local time on Saturday. They arrived on the scene where Berry was found unresponsive. He was pronounced dead at 1:26 p.m., according to the police department.