Harold Shipman: police faced public backlash while investigating Britain's biggest serial killer

Serial killer, Harold Shipman Credit: pa

A new documentary to mark the 20th anniversary of the arrest of Britain's biggest serial killer airs later.

Dr Harold Shipman killed more than 250 of his patients across three decades.

Officers from Greater Manchester Police have spoken about the backlash they faced from the public in Hyde who were initially sceptical about the allegations about their GP.

Dave O'Brien, who's now retired, worked as a Detective Constable for GMP.