“The Resurrectionist” from Trysts: A Triskaidecollection of Queer and Weird Stories by Steve Berman (Lethe Press, 2001).
You may want to refrain from reading this one right before going to sleep.
At the start of the story the protagonist, Wallace, seems like a petulant, spoiled child, brooding over the fact that he must take a turn as a night watchman to guard his uncle’s fresh grave from robbers. But as the story progresses and his backstory becomes known – and in spite of the deplorable and chilling action he then takes – he is revealed to be a sympathetic character. That’s quite a feat.