Panorama reveals the controversial video-taped interview with the mother of Baby P and asks whether crucial warning signs were missed. Tracey Connelly tells clear lies in the training interview with a senior social worker. But she also gives some vital clues about what was going on in her son Peter's life. Panorama investigates whether these clues were adequately followed up, and examines the ground-breaking research into child protection that is now a part of Baby P's legacy.