Sam looked at the dead body which didn't show any signs of movement, but the body instantly aged due to the escape of the vitality, the body became extremely dry and skin cracked.
He checked the body once again and he found out that except for the escape of the vitality and the immediate change that happened to the body due to that sudden escape, the body is still extremely strong and solid.
He watched as the body slowly turned into the Undead. Sam doesn't know why this happened, because from what Philip said, they only turned into undead when they are absorbed by others.
If he does compare the vitality escaping his body to another person as absorbing, then this undead phenomenon does make sense.
Sam observed the body and noticed that he only killed the person by damaging the heart with his spiritual disintegration. But the rest of the body is extremely intact.
