Brief 19: 48 Hours, "The Mysterious Death Of Casey Kasem"

Was there a crime committed in Kasem's 2014 death? Which one? And by whom? "The Long, Strange Purgatory Of Casey Kasem" (https://www.gq.com/story/last-days-of-casey-kasem) "The Worst Kasem Scenario" (http://previously.tv/law-and-order-svu/the-worst-kasem-scenario/)