The leader of a body-snatching ring responsible for stealing the bones of veteran broadcaster Alistair Cooke will plead guilty next week despite US prosecutors trying to withdraw a plea deal.

Michael Mastromarino netted millions of dollars for his role in the hacking up of hundreds of corpses before forging donor consent forms and selling the parts on for transplants.

Lawyers believe that around 40 unsuspecting British patients received the stolen bone graft material. Brooklyn Supreme Court Justice Albert Tomei ordered US prosecutors to honour a plea bargain reached last month when the 44-year-old former dentist appeared in court today.

Repeatedly hitting the bench, the judge said: "I'm not here to have show trials. I'm here to do justice."

The judge dismissed the Brooklyn assistant district attorney's argument that only a trial would fully redress the harm caused by Mastromarino as "specious and of no substance".