The killers of PC Andrew Harper got more than £650,000 legal aid funded by taxpayers, figures reveal.
It dwarfs the £465,767 earlier reported given to Henry Long, 19, and 18-year-olds Albert Bowers and Jessie Cole.
And it is set to rise as all three have challenged their sentences, while the Appeal Court will also consider claims the terms were too lenient.
Ministry of Justice figures show Long got £239,430, Cole £207,932 and Bowers £206,776.
PC Harper’s wife Lissie, 29 – whose Andrew’s Law campaign aims to get life sentences for killers of 999 personnel – said: “I am sure the public will be as staggered as I am to know these escalating legal costs – defending those that show no remorse for their actions.
"I will keep fighting for what is right and fair and I thank Sunday Mirror readers for their unstinting support.”
The trio were cleared of murder but convicted of manslaughter. Long, the driver, got 16 years and his pals 13.
PC Harper, 28, died in August last year, tangled in a tow rope behind the fleeing thieves’ car in Berkshire.
Lissie, backed by the Police Federation of England and Wales, stresses her campaign is about valuing those who put their lives on the line every day.
Previously asked if she was angry towards the jurors - one of whom was said to have cried after the verdict was read - Lissie said: “I feel very let down.
“Somehow they didn’t see what the whole rest of the country could see.
“But I’m putting all my energy into Harper’s Law so that it doesn’t happen again, to someone else.”