Apparently it was a suicide.
I went to Wizard Con in Tulsa a few years ago, mostly just to meet him. We were waiting in line for him to show up for the photo ops, and I was probably the 30th person in line. In front of me was a woman and her daughter (probably about six or seven) who was wearing a Power Rangers costume. So instead of showing up at the enclosed photo booth we were lined up at, Jason comes to the line right in front of me and starts addressing everyone, asking if we were enjoying the event, etc. Then he does an aikido roll under the queue tape, goes straight to the girl, and gets down on his knees to talk to her. After that, with her mom's permission, he picked her up and spun her around, and then bid us all adieu as he made his way to the makeshift photo booth. He definitely gave off vibes of being a genuinely good guy. Rest in peace, Tommy.
Me as Hagrid at the convention: