There is absolutely no indication that this is anything but an accident.

While liver disease appears in his history, it does not appear that it has anything to do with his cause of death.

His heart was enlarged, weak and could have given out at any time.

It had a significant impact on our ability to communicate and function.

We don't know how much he ingested or when. There are a lot of 'what ifs' to be factored in.

Primarily, he just had a bad heart.