Meaning of dreaming the killed man became the one serving out the sentence

A young man was killed and his killer was convicted and sentenced to serve one life sentence in jail. The murdered man’s relative dreamed of the deceased serving his life sentence in prison. There are reasons why this dream was created by the brain. The killer serving out his sentence was a reminder of the young man’s murder, every day of the sentence. It was like the victim was being killed over and over again.