An attorney for Ed Mangano claims prosecutors hid key evidence and are demanding the dismissal of corruption charges against the former Nassau County executive.

Claims of hidden evidence and concealed witnesses are just part of the 42-page motion filed Wednesday by Mangano's attorney, Kevin Keating.

Keating is now demanding that all charges against Mangano be dropped, citing new evidence that has come to light since Mangano's mistrial. Keating says it shows the first trial was "anything but fair."

After the trial, jurors told Newsday that the main issue they couldn't agree on had to do with Mangano's role in a so-called bread and rolls contract to a bakery owned by restaurateur Harendra Singh.

Keating says in the motion: "The government knew of, but concealed the identity of a key witness who completely contradicted the prosecution's narrative concerning the bread and rolls contract."

Singh was the prosecution's star witness in Mangano's first trial. He was on the witness stand for 13 days.

"Prosecutors actively solicited testimony from Singh which they knew or should have known were false," Keating states. "Unequivocal evidence now shows that prosecutors repeatedly suppressed...favorable evidence, to the defense, and permitted Singh to perjure himself in the presence of the jury."

He concludes by saying Mangano should not be prosecuted again: "Having been forced to run the gauntlet of a federal criminal trial - a brutal 12 week ordeal which left the Manganos both financially and emotionally drained - the Defendants now learn that they were deprived a fair opportunity to obtain a full acquittal, due to serious and pervasive prosecutorial misconduct."

Keating also says he asked the prosecution time and time again to turn over all of the wiretap recordings made during the investigation. He claims the vast majority of them were never produced.

There was no comment from the U.S. Attorney's Office on the motion.

Jury selection for the second trial is scheduled for next month.