Conspiracy theory du jour...body double

[jberryhill]

36. When the blood pressure goes to zero...

It is guaranteed that there is what looks like bruising all over the place after a short while.

It’s one of the ways that you know how long someone has been dead, by the extent of blood pooling.

It’s called livor mortis

https://en.m.wikipedia.org/wiki/Livor_mortis

And can also produce small postmortem hemorrhages:

Postmortem hypostasis (livor mortis or lividity) is classically defined as the intravascular pooling of blood in gravitationally dependent parts of the body after death. However, intense lividity can be associated with small hemorrhages in the skin, so-called postmortem hypostatic hemorrhages (Tardieu spots).