In January 2001, five-year-old Logan Marr was found dead in the basement of her foster mother's home in Chelsea, Maine. The foster mother, Sally Schofield, was a highly respected former caseworker for Maine's Department of Human Services. FRONTLINE examines the girl's short, troubled life and asks a series of tough questions: Why was a little girl who had never been abused taken from her birth mother? Was her mother given a real opportunity to regain custody? And did the state miss significant clues that she was in danger? Through extensive interviews with key figures involved in the case - including exclusive access to Schofield herself - FRONTLINE rewinds the story to look closely at the events that led up to Logan's death: from the state's decision to remove her from her birth mother's home to her troubled decline and eventual death in foster care. FRONTLINE continues its examination of Maine's Department of Human Services on February 6 with the one-hour documentary "Failure to Protect: The Caseworker Files" followed by a one-hour town meeting on child welfare policy.