A case study in how the double jeopardy law sometimes helps criminals escape punishment. Melvin Ignatow was acquitted of the brutal murder of his girlfriend. But later, when key photographic evidence was discovered, Ignatow couldn't be retried for murder.
Bill Kurtis probes the bizarre murder case of Tom Bonney, who shot his 19-year-old daughter 27 times in 1987. Claiming that he suffers from multiple personalities disorder, Bonney says that one of his "other" personalities committed the killing.