P-13.1, r. 1 - Code of ethics of Québec police officers

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7. A police officer must respect the authority of the law and of the courts and must collaborate in the administration of justice.
A police officer must not:
(1)  prevent or contribute to preventing justice from taking its course;
(2)  conceal or fail to pass on evidence or information in order to benefit or harm any person.
O.C. 920-90, s. 7.