@banjomarx
that's the job of the knights (or not, because knights, who are probably also nobles, have better things to do... unless their lord is a weirdo or is extremely rich)
all MC going to do is report that he killed the Great Reaper (and tell them there's a body there)
only way MC will get into hot water is if someone identifies the dead guy as family or friend or something and then deny that the dead guy is the Great Reaper (and then accuses MC to be the Great Reaper)
Great Reaper or not, the body could have been of a random bandit or robber
at that point, nobody would really care as those types of people are usually outlaws
they could even just say that the Great Reaper killed the guy