"Was a monstrous killer brought to justice or an innocent mother condemned? On an April night in 1989, three small children perished in a Los Angeles apartment fire. Their young mother, Jo Ann Parks, escaped unharmed, the sole survivor and only eyewitness. Though they at first believed the fire had been a tragic accident, forensic fire investigators soon uncovered evidence that Parks had sabotaged wiring, set several fires herself, and even barricaded...