0 a person, especially a criminal, who gives the police a lot of information about the activities of criminals, especially serious ones
There was neither a shortage of ' supergrasses ', nor of confessions of various kinds.
Sadly, they have been incarcerated through the alleged evidence of the supergrasses.
What must be said is that by the very nature of past history a supergrass must be an unsavoury character.
There has been increasing popular disquiet concerning the reliability of supergrasses.
There are no cases currently pending which would result in the reintroduction of so-called "supergrass trials".
I hope that we shall be told about the rumours of unconditional immunities for supergrasses.
This legislation inevitably produced the nightmare of the "supergrasses".
It is a question of the whole reliability of evidence from supergrasses.
