Number 1 rule is ALWAYS use jack stands when crawling under a car. That is a rule many mechanics insist on. Like you said, wonder if he lingered while dying, knowing he was screwed.
As I have told many people over the years that want to just use a hydrolic jack to hold up a vehicle, the only thing holding is a o-ring.
“...wonder if he lingered while dying, knowing he was screwed...”
If there was any justice the brunt of weight would have been on his chest such that he couldn’t call for help. Then either said weight prevented adequate breathing and/or he froze to death. All this over a couple of hours. I DESPISE THIEVES!