What is the defining characteristic of Livor Mortis?

The defining characteristic of Livor Mortis is the pooling of blood leading to skin discoloration. This phenomenon occurs post-mortem as the heart stops pumping blood, allowing it to settle in the lower parts of the body due to gravity. As the blood pools, it causes a distinct purplish discoloration in the skin, which can provide important information regarding the position of the body at the time of death and the time that has elapsed since death.

The correct response highlights this process, which is critical in forensic investigations. Understanding Livor Mortis helps forensic professionals determine factors such as the time of death and whether the body has been moved after death, as the pattern of discoloration will change depending on the body's position.