The suspension apparatus was used for the body to bleed out. But there aren't five quarts of blood on the floor. When the suspended body was shot in the crotch, there was no blood spattered on the walls or floor.
Camera is reflected in the mirror as Ray opens the door of the living room.
When Ray walks into Caspere's house, he should have smelled rotting blood. If Caspere bled out days ago, then the smell would be over powering.