Leiby Kletzky

He was killed on his "first day of walking home by himself."

See New York Times, "Hasidic Brooklyn Boy's Remains Found; Suspect in Custody":

The search for a missing 8-year-old Brooklyn boy ended early on Wednesday when investigators discovered what they believed to be his dismembered remains in a third-floor attic refrigerator of a Brooklyn man and in a trash bin on a street, the police said. The man, who made incriminating statements, was being questioned and was expected to be charged, the police said.

The grim discovery capped two days of intense searching for the boy, Leiby Kletzky, who had disappeared while on what was supposed to be a short walk between a Borough Park school and a meeting place with his parents on Monday. Police detectives searched around his neighborhood and used helicopters to find the boy, who was part of the Hasidic Jewish community. They recovered video that clearly showed the boy alive.

In the end, the inquiry led to 466 East Second Street, in Kensington, Brooklyn, the home of the suspect, Levi Aron, 35, who was taken into custody at 2:40 a.m., said Police Commissioner Raymond W. Kelly.

Mr. Kelly said that the boy was lost and apparently was trying to find his way when he encountered Mr. Aron; investigators said that after a conversation, the boy entered Mr. Aron’s vehicle, a 1990 Honda Accord.

More at that link above. And also, "Reaction to the Leiby Kletzky Killing." And at Memeorandum.