Lots of things we can add.

Last time I popped my patella out of place, it went back in on its own with very little visible swelling. I still couldn't put my weight on the stupid thing for two days without the help of a cane AND a brace, or it would slip out again.

Other possibilities is he only had two quarts of water plus whatever he'd drank after the bladder popped.

Autopsy is going to have to make the call. Anyone who wants to try to make a comment about Spader at this point is trying to make hay.