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

Question: was he arrested?
Self-contained rewrite: was Harold Shipman arrested?