turn king's/queen's evidence

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turn king's/queen's evidence

To provide evidence in court implicating other parties involved in the crime for which one has been charged, in order to receive a reduced sentence or to avoid prosecution altogether. Primarily heard in UK. We're leaning on him pretty hard, so we think he'll turn king's evidence and finger his accomplices.
See also: evidence, turn

turn King’s/Queen’s ˈevidence

(British English) (American English turn State’s ˈevidence) give information against other criminals in order to get a less severe punishment: One of the gang turned State’s evidence and identified at least three others involved in the fraud.
See also: evidence, turn
References in periodicals archive ?
An armed robbery getaway driver has been spared from jail after turning Queen's Evidence.
It's a bit like one of those Witness Protection Programmes, where you get a new life in return for turning Queen's Evidence on someone.
And if anyone should know about turning Queen's evidence it is Wavertree-born Grimes.
At Newcastle Crown Court, Judge John Milford told Hay that although he would receive a reduced sentence for turning Queen's Evidence he did not feel the pimp had been completely honest and would not receive the full reduction.
Myatt pleaded guilty to conspiracy but was treated more leniently after turning Queen's evidence.
Balanced against that there was his extensive co-operation with the prosecution authorities and the fact that the information he supplied, and his turning Queen's evidence on a number of occasions, not only led to five of his partners in crime being convicted by jurors, but also led to eight others admitting their roles.