On the night of December 30, 2000, a family of four was murdered inside their home in Setagaya, Tokyo. Mikio Miyazawa, his wife Yasuko, their daughter Niina, and their young son Rei were found dead the next morning.
The killer left behind an almost impossible amount of evidence: clothing, fingerprints, blood, and DNA. But instead of fleeing immediately, he appears to have stayed inside the house for hours after the murders.
In this episode of Unsolved and Missing, we revisit one of Japan’s most haunting cold cases, the clues left behind, and the question that still chills investigators: how can a killer leave so much evidence, and still disappear?