A few years ago I read a sci-fi story (probably a novelette) in a known magazine of the genre. Unfortunately I am not sure about the magazine, although I have the impression it was the Asimov's.
The story was taking place in a southern US state and was about the victims of a killer and the efforts of a relative (maybe the father) to get some answers about the crime. I think the killer had been apprehended and he was waiting to be executed, as he had been sentenced to death.
The storyline expanded in a period of a few years (if I remember correctly) and at some point a new kind of technology is invented where the victims of murders come back after the killers are executed.
The story ends when after the execution of the person found guilty, the relatives of the protagonist don't come back and he finds out that the real perpetrator of the crime is another person (I think a child with some health issues).
The story was written with the intent to criticize the death penalty.