The killers of PC Andrew Harper will not have their sentences increased after judges rejected the attorney general’s case that they were “unduly lenient”.
Suella Braverman QC had argued Henry Long, Albert Bowers and Jessie Cole should be handed longer jail terms.
She said the sentences of the three men had caused “widespread public concern”.
PC Harper died after he was dragged for more than a mile behind a car driven by Long, 19, in Berkshire in August 2019.
Long, Bowers and Cole were all cleared of murder following a trial at the Old Bailey, but were convicted of manslaughter.
Long was jailed for 16 years, while getaway car passengers Bowers and Cole, both 18, were sentenced to 13 years each.
Dame Victoria Sharp said at the hearing earlier that applications made by Long, Bowers and Cole to appeal their sentences for manslaughter had also been refused.