in a secret or underhanded manner; to induce a person to commit perjury; and to obtain perjured testimony from another.
Hence, the attorney cannot be wilfully blind to the fact that their witness is giving false, perjurious testimony.
An attorney who encourages a witness to give false testimony is suborning perjury, a crime punished either with formal disciplinary action, disbarment, jail, or a combination thereof.
A false statement by an attorney in court also is a crime similar to subornation of perjury and is punished accordingly.
The practice of ″horse shedding the witness″ (rehearsing testimony) (also known as woodshedding), is an example of such perjurious criminal conduct by an attorney, which is depicted in the true-crime novel Anatomy of a Murder (1958), by Robert Traver – John D. Voelker, a justice of the Michigan Supreme Court – and in the eponymous film (Otto Preminger, 1959), about a rape-and-murder case wherein are explored the ethical and legal problems inherent to the subornation of perjury.