On the night of December 30th, 2000, in the quiet suburbs of Tokyo, a family prepared to ring in the new year. Mikio and Yasuko Miyazawa, along with their two young children—8-year-old Niina and 6-year-old Rei—were at home, winding down the final hours of the 20th century. But someone else was in the house. Sometime between nightfall and dawn, a killer entered their home. What happened next would become one of Japan’s most disturbing and mysterious unsolved murders. All four family members were brutally killed in their own home. And yet—what truly confused investigators wasn’t just the violence. It was what the killer did after the murders. He stayed… He ate their food… He used their toilet. He might have even taken a nap on the family’s couch. And when he finally left, he didn’t bother to clean up. He left behind his clothing, his blood, and his DNA. And still—he was never found. I’m Courtney Fretwell, and this is Find My Killer. Today, we unravel the case that left Japan in shock—and ask: how does a killer leave so much behind... and still vanish without a trace? Learn more about your ad choices. Visit megaphone.fm/adchoices