The drugs Promethazine and codeine are often mixed together with Jolly Rancher candy and alcohol to create "sizzurp" or "lean," a habit associated with Houston's "chopped and screwed" movement. According to assistant chief coroner Ed Winter, Butler did not overdose, but a sleeping disorder...

Butler, 33, was found dead in a Los Angeles hotel room in December after a concert at the nearby House of Blues. His death will be ruled accidental, but "sizzurp" also played a role in the deaths of Houston legends Big Moe and DJ Screw. Butler's partner, Bernard "Bun B" Freeman told...