Two of PC Andrew Harper’s killers are appealing against their 13-year sentences for manslaughter.
The officer’s mum Debbie Adlam said it is “another kick in the stomach”.
Albert Bowers and Jessie Cole, both 18, have lodged applications with the Court of Appeal seeking permission to challenge their sentences and convictions.
PC Harper, 28, died last summer when he was dragged along country lanes by a car being driven by Henry Long, 19.
Bowers and Cole were the passengers.
The brave officer was trying to apprehend the trio who were fleeing after stealing a quad bike.
The teenagers were cleared of murder but convicted of manslaughter.
Debbie said: “It’s been the most painful year of my life and the trial was gruelling.
"We didn’t get the justice we all felt we deserved – but this application to appeal conviction and sentence is a further kick in the stomach.
“I’d like to think I do not live in a country where people can be involved in taking a life whilst committing a crime... and serve anything other than a lengthy custodial sentence.”
The killers laughed throughout the trial including during evidence detailing the officer’s horrific death in Berkshire.
As PC Harper tried to stop the gang, his ankles were lassoed by the loop of a tow strap trailing behind the car as it drove off at high speed. No date has been set for the hearing of the appeals. Long was sentenced to 16 years.
PC Harper’s widow Lissie, 29, has launched a petition in her bid for a law to ensure those who kill emergency services workers get a mandatory life sentence.
She said her late husband would want her to push for the reform. Lissie said: “It’s doing something for him and creating his legacy... and turning a situation that is horrific into something that might make a difference in future.”
Separate to the killers’ appeals, the Attorney General’s Office has been asked to review the sentences to consider if they were too lenient.
