Patients who die with kidnay failure geberally have greyish yellow skin before deat, and if they die of kidnet failure, their skin has a whitish coating called "uremic frost." Both are missing in these pictures.
I just thought of someting else. See that bruise over the left eyelid? That's a fresh bruise, no more than one day old, I'd say. In a truly dead body, the blood pools and slide down the planes of the body to a dependent position, pulled there by gravity. In the case of a corpse positioned on its back, the poling would be on the corpse's back
Somethig else. I see no signs of rigor mortis in these photos. A body with a bruise that fresh (ie, 24 - 48, even 72 hours or so) would be in a state of rigor.
Hope this helps