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before dna and fingerprints identification was invented?

• trashbag

  20 Aug 09, 00:17

  Before dna and fingerprints identification was invented, was it very difficult for the police to solve crimes?

   

  Because they can only rely on witness..

• Shao Wei

  20 Aug 09, 00:24

  

• Singmarine

  20 Aug 09, 09:24

  Last time, sperm trace is used.

• trashbag

  20 Aug 09, 09:27

  and before sperm trace was invented?

  sperm trace is only useful for rape cases. for non rape cases can't use it