Part of the documentary series looking at the most notorious murders of the twentieth century. This volume looks at cases where the killer was never captured,or where there is reasonable doubt that the wrong person was convicted of the crime. 'Evading Justice' looks at the notorious unsolved Green River Killer murders,the Zodiac Killer,and the infamous Jack the Ripper. 'A Question of Doubt' looks at the murder of union boss Jimmy Hoffa,whose body was never found,as well as the real-life inspiration for 'The Fugitive',Dr Sam Sheppard,who was convicted of his wife's murder but always protested his innocence. 'Evidence of Murder' examines the physical evidence that brought particularly gruesome murders to light,from the dismembered corpse of Stanley Setty found in the English Channel,to the grisly remains found in the house of John List in New Jersey.