Every Friday, we're bringing you one episode of the series ‘Degrees of Abuse’ produced by Al Jazeera’s Investigative Unit.

More incredible revelations about how a Ph.D. student at Glasgow University lied about his dead wife and falsely accused innocent people of killing her. The question is, why has it taken almost four years for Glasgow University to investigate multiple complaints about him?

*Please note some listeners may find these accounts upsetting.

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