Toxic mail

A C4 docuseries unwraps a deadly online business

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In October 2021, David Parfett was devastated to learn that his son Tom had been found dead in a hotel room with poison next to his body. He was 22 and had taken his own life.

As Parfett struggled to come to terms with his grief, his son's tragic death then led him into a disturbing world of online suicide forums - and to a website run by a man who was sending lethal poison worldwide by post for a fee.