Japan, Britain and Canada failed to pursue any significant prosecutions, the group said.
Although the opposition and the protesters are at odds on major points — notably the question of whether Mr. Saleh and his family should receive immunity from prosecution — both groups are keen to use Mr. Saleh's absence to remove him permanently from the political scene.
There have also been arrests or prosecutions of groups of men in 11 towns and cities, including Oldham, Rochdale and Derby.
Another successful prosecution involved a group that wanted to blow up American jetliners over the Pacific Ocean.
Mr. Hynes took office in 1990, shortly after he was appointed to take over the criminal prosecution of a group of white teenagers who beat a black man and chased him to his death on the Belt Parkway in Howard Beach, Queens.
American officials said that in pursuing prosecution for the group of 15 pirates, for example, the United States had asked several countries to consider taking the cases, but not the most obvious venue — Iran.
In 1972, he produced the film version of Philip Berrigan's play, The Trial Of The Catonsville Nine, about the prosecution of a group of Vietnam protesters for civil disobedience.
Raj Chada, of solicitors Hodge, Jones Allen, which represented the protesters, said: "As well as the millions spent on the eviction itself, Basildon council sought to spend even more on a vindictive prosecution of a group of people who happened to disagree with them – and this at a time when local services are being slashed because of budget cuts.
"As well as the millions spent on the eviction itself," he said, "Basildon Council sought to spend even more on a vindictive prosecution of a group of people who happened to disagree with them - and this at a time when local services are being slashed because of budget cuts.
In 2012, when the Englewood Four were eventually freed, Alvarez defended the prosecution of another group of exonerees known as the Dixmoor Five on 60 Minutes.
