"Dark Retribution"
Triangle 1994-2.
Continued from Superman: The Man of Steel #29, continues in Adventures of Superman (1987) #508.
As Cat's depression and attitude spiral deeper into darkness, Superman promises to find her son's murderer and bring them to justice. Since the Man of Steel's abilities have been steadily increasing after his return from the dead, he finds it easier than he thought to use all of his super senses to sweep the harbor area and find what he's looking for - the Toyman!
Now that the man who took her son's life is behind bars, Cat wants revenge more than anything. Sneaking the gun into the county jail was child's play, but can she do it? Can Cat Grant murder the Toyman in retribution for the loss of her only son?