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RULE 4-3.3 CANDOR TOWARD THE TRIBUNAL
(2) fail to disclose a material fact to a tribunal when disclosure is necessary to avoid assisting a criminal or fraudulent act by the client;
(3) fail to disclose to the tribunal legal authority in the controlling jurisdiction known to the lawyer to be directly adverse to the position of the client and not disclosed by opposing counsel; or
(4) permit any witness, including a criminal defendant, to offer testimony or other evidence that the lawyer knows to be false. A lawyer may not offer testimony that the lawyer knows to be false in the form of a narrative unless so ordered by the tribunal. If a lawyer has offered material evidence and thereafter comes to know of its falsity, the lawyer shall take reasonable remedial measures.
The duties stated in subdivision (a) continue beyond the conclusion of the proceeding and apply even if compliance requires disclosure of information otherwise protected by rule 4-1.6.
A lawyer may refuse to offer evidence that the lawyer reasonably believes is false.