Leiby Kletzky, the 8-year-old missing Brooklyn boy, was found brutally killed and dismembered on Wednesday morning. His chopped-up remains were found in the murderer's refrigerator and a nearby dumper. The murderer has already pleaded guilty of killing.
Kletzky disappeared on Monday, when he was on the way to his parents' home from a summer camp. This is the first time Kletzky was coming home alone with his parents' agreement.
Start the slideshow to find out how the investigators found the killer.