Conversation so far:
what was detection?
Linda Reynolds from Frank Massey and Sons funeral parlour, expressed concerns to John Pollard, the coroner for the South Manchester District, about the high death rate among Shipman's patients
who had died when the detection of harold shipman happened?
Harold Shipman's patients died
how did Harold Shipman's patients die?
lethal doses of diamorphine
was Harold Shipman arrested?
Harold Shipman was arrested on 7 September 1998

Question: what happened with the investigation?
Self-contained rewrite: what happened with the investigation against Harold Shipman?