I listened to a short interview with Joseph Scott Morgan earlier this evening and he said that the autopsy will be important to determine if something was possibly put into Jimmy Gracey's drink, and also looking at his hands for any defensive wounds, any signs on his body of foul play, etc. And that the investigation will continue with analysis of the security video, interviewing people at the bar who may have interacted with him, etc. I tried to find the link again to post it here but can't find it now. Hopefully, tonight he and other experts will be giving more interviews and discussing the case and the various possibilities of cause and manner of Jimmy's death. It's too early simply to say that his death was an accident.
JMO since I can't find the link.