Channel Four, in the UK, are broadcasting a three part documentary on this affair which seemed to entail - but not entirely prove - police corruption and a larger criminal conspiracy. There was also an excellent podcast about the matter.
Welsh Private Investigator Daniel Morgan is found, fatally murdered by axe, in a Catsford pub car park in 1987 and a mystery spirals from there:
Welsh Private Investigator Daniel Morgan is found, fatally murdered by axe, in a Catsford pub car park in 1987 and a mystery spirals from there: