Hanratty : The Mystery of Deadman's Hill, original 1992 documentary, part 3 of 7

3rd part of Bob Woffinden's 1992 Channel 4 documentary about the A6 Murder.

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That's the problem with line-ups. Often times, a witness is subconsciously driven to select someone in the group, even though the perpetrator may not be present. Sometimes, all it takes is someone that looks similar to the criminal, and the witness can be convinced that that person is the one.