Riverdale Cast React to Who Killed Jason Blossom

YH is at Paleyfest to catch up with the cast of The CW's "Riverdale", including Cole Sprouse, Lili Reinhart, KJ Apa, Madelaine Petsch, Casey Cott, and Ashleigh Murray, the get their reactions to who killed Jason Blossom (Spoiler Alert??) and to see just how well they know each other's tweeting habits!