Overview
"Sometimes They Come Back" is a short story by Stephen King, first published in the March 1974 issue of Cavalier and later collected in King's 1978 collection Night Shift.
Plot summary
In 1957, nine-year-old Jim Norman and his twelve-year-old brother, Wayne, walk to the local library to return Jim's books. They are attacked by a gang of local greasers. Wayne is stabbed to death by two of the older boys, but Jim escapes. Through random times in his life, Jim is haunted by nightmares vividly reenacting the murder.
In 1974, Jim is married and starts a new job as a high-school English teacher. All seems to go well until after the Christmas holiday. Jim learns that one of his students was killed in a hit and run accident. A new student is added to Jim's class. Jim recognizes the boy as Robert Lawson, one of the greasers who killed his brother. Lawson appears to be the same age as he was in 1957.
Another student falls to her death a week later, and another of the greasers, David Garcia, joins Jim's class. He also appears to be the same age as he was in 1957.
From Wikipedia (CC BY-SA 4.0).