material witness

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Noun1.material witness - a witness whose testimony is both relevant to the matter at issue and required in order to resolve the mattermaterial witness - a witness whose testimony is both relevant to the matter at issue and required in order to resolve the matter
witness - (law) a person who testifies under oath in a court of law
References in classic literature ?
That one dint in the short, green grass was the only material witness left of this inexplicable nocturnal flight.
Addie is ordered to remain in Paris as a material witness to the murder, threat of war or no.
As part of the settlement, the federal government offered its regrets and agreed to compensate US citizen Abdullah alKidd over his arrest and detention as a material witness in the wake of Sept.
He twiddled his moustache, adjusted his hat, tapped his cane and said: "It must revolve around a material witness monsieur.
Pulido now petitions review of the Superior Court's denial of his motion to examine a material witness in Mexico.
State material witness statutes follow a similar pattern.
Al-Kidd was arrested pursuant to a material witness warrant and detained for sixteen days in several high-security prisons as part of the FBI's investigation of terrorist activities.
MILFORD - A material witness to a horrific accident in August in which an illegal immigrant allegedly struck and killed a local man has disappeared after having cut his monitoring bracelet, and officials are furious they were not informed promptly of the violation.
Abdullah Kidd, a convert to Islam who was known as Lavoni Kidd when he played football for the University of Idaho, claimed that Ashcroft had authorized a policy of using the material witness statute -- designed to ensure the presence of witnesses at trial -- as a way of holding suspected terrorists when there was no probable cause to do so.
Michael was receiving injections of Demerol and Midazolam from Dr Klein for several months preceding the last days of his life and Dr Klein is a relevant and highly material witness.
VX) as material witness in an investigation against banks for allegedly helping Americans evade taxes, Dow Jones has reported, citing a separate report by Swiss weekly Sonntagszeitung.