By an extraordinary twist of fate, a human arm expelled by a shark became the first link in a bizarre chain of events involving smuggling, blackmail, and murder.

It was a balmy spring afternoon on April 17, 1935. Bert Hobson and his son Ron were fishing from a 12-foot (3.6-meter) launch off Maroubra Point in Coogee, Sydney, Australia. Dissatisfied with their catch so far, they put out set lines baited with horse mackerel before returning home for the evening. The following morning, they returned to see if their set lines had caught anything profitable. They were surprised to discover a tiger shark measuring a mighty 14 feet 6 inches (4.42 meters). The shark had been lured to the set line to feast on a smaller ...

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