La préparation des témoins par la Couronne : une étape non seulement appropriée, mais essentielle à la saine administration de la justice afin d'encadrer les témoins avant leur témoignage

R. v. Trought, 2019 ONSC 1421

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[18]                 Crown counsel’s preparation of witnesses for trial is not only appropriate but also necessary for the efficient administration of justice and the truth finding process.   See R. v. Liard and Lasota, 2013 ONSC 5457:

[424]       It is not just proper for Crown counsel to interview witnesses prior to their testifying: it is necessary that these meetings take place.  Witnesses are often not familiar with courtroom procedures and the rules of evidence.  Unprepared witnesses may blurt out things that should not be said in front of the jury.  They may be too talkative, and less than responsive to the questions they are asked.  Testifying is an unusual, and even intimidating experience for many witnesses.  Counsel owes it to the witness and to the court to prepare witnesses carefully.