PC Harper, from Wallingford, who served as an officer in Abingdon, suffered catastrophic injuries after being dragged down a country road behind the car of three teenagers trying to flee the scene of a quad bike theft in Sulhamstead, Berkshire, in 2019. Jessie Cole (left) and Albert Bowers, convicted of the manslaughter of PC Harper (Image: TVP)READ MORE: Teenager attacked by 'group of youths' in Oxfordshire townFormer Detective Superintendent Stuart Blaik told the BBC he was “deeply concerned and appalled” by the prospect and that Cole and Bowers should “not be afforded the opportunity” of early release. Former Detective Superintendent Stuart Blaik (Image: NQ)He said: “Neither of them showed any remorse during their time in police custody or during their subsequent trial. The officer’s widow Lissie Harper said the Government “has punched us in the gut… they should be ashamed of themselves”. READ MORE: More than 200k people in 24hrs demand action to stop cop killers' releasePC Andrew Harper (Image: Oxford Mail)But a campaign led by the Thames Valley Police Federation and PC Harper's widow is calling for killers of police officers to also be barred from getting out early.