With Philip Polkinghorne being interviewed at the police station, detectives decide to step up their search of his house. Amid tests for fingerprints, DNA and blood - a hunt dubbed unprecedented by the detective sergeant in charge of the scene - officers make a series of discoveries that shape the investigation. But in court they’re asked if police and forensic scientists might have made up their minds too soon.

WARNING: This podcast references suicide right from the start and throughout the episode. Some listeners might find this distressing. Click here for where to get help in New Zealand.

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