Dark red slime suddenly oozed from the dusty cold case file No. 7 In the National Archives.
The moment Lin Yang put on his gloves and touched it, he heard the woman yell: "He's in the wall!"
Under the wallpaper of the centuries-old haunted house where the crime occurred, fresh blood beads oozed out and formed a code.
The forensic report showed that the victim's heart disappeared mysteriously, but the fingerprints on the corpse appeared on the murder weapon thirty years ago.
Late at night, surveillance cameras captured a headless figure repeatedly carving the same number in the corridor - it was Lin Yang's police badge number.
He pried open the basement brick wall and discovered numerous glass jars containing still-beating hearts.
The label on the jar shows that all the hearts are from cold case victims and are dated as of this evening.
When the last heart stopped beating, warm plasma began to ooze from the walls of the entire haunted house.
Lin Yang picked up a yellowed photo from a pool of blood - a baby in swaddling clothes, with a smiling housekeeper standing behind him.
