Scientists have always had to collect blood at the crime scene and transport it back to the lab for testing. Photo: Couperfield/Shutterstock

It might now be possible to tell someone's age from blood at a crime scene

Trials of on-site test which measures enzymes had an almost 100 per cent success rate

Topic |   Business Insider

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Scientists have always had to collect blood at the crime scene and transport it back to the lab for testing. Photo: Couperfield/Shutterstock
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