How science may just end up killing crime

1983. Forensic scientist Steve Cordiner's first homicide.

He arrives in a Lower Hutt house to find a woman dead, her head bashed in, blood everywhere.

Cordiner opens a plastic sewing box for a "notebook, my pens, my rulers, some chemicals to do some presumptive tests of blood, and that was about it".

He uses those to study "the patterns of blood stains on the wall, to give an opinion as to the minimum number of blows that must have occurred, from where the blood was and how it was distributed".

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