To a reporter, the strange surfacing of notes and papers from a long-ago homicide case was a puzzlement; to Janet Acevedo, seeing a box with the notes inside was like “opening a coffin.”

On June 28, a box was found at a ballfield and reported to police. It contained clothes, ride tickets stolen from a carnival, and a reporter’s handwritten notes, copies of criminal court documents, and an envelope with the reporter’s name on it.