noun
EXAMPLES FROM CORPUS
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And almost 10 years ago Atcheson was arrested and charged on the evidence of loyalist supergrass James Crockard.
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Both turned supergrass and were the main prosecution witnesses in the trial of the other men.
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Four of those are of supergrasses.
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From 1993 the state hit back with troops, new laws and supergrasses.
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Local bully Billy Hodge is about to turn supergrass under pressure from his wife.
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Prosecutors said the allegation was made long ago by an unreliable supergrass , and no investigation is expected.
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The report, drawn from evidence given by supergrasses, identified those whom the Mafia considered allies or potential allies.