queen's evidence

noun

Also called (when the sovereign is male): king's evidence. US equivalent: state's evidence. English law (when the sovereign is female) evidence given for the Crown against his or her former associates in crime by an accomplice (esp in the phrase turn queen's evidence )

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Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It would all end in one of you turning Queen's evidence and the other two being hanged.

"True,--and I look forward to turning Queen's evidence."

Of course we might, if he were arrested, allow him to turn Queen's evidence, but there is always a certain feeling against this class of witness.

I was then the sole occupant of the Queen's evidence side of the prison, a place I had chosen as I preferred to be alone.