In the course of representing a client a lawyer shall not knowingly:
(a) make a false statement of material fact or law to a third person; or
(b) fail to disclose a material fact to a third person when disclosure is necessary to avoid assisting a criminal or fraudulent act by a client, unless disclosure is prohibited by Rule 1.6.
2004 ABA Model Rule Comment
RULE 4.1 TRUTHFULNESS IN STATEMENTS TO OTHERS
Misrepresentation
[1] A lawyer is required to be truthful when dealing with others on a client’s behalf, but generally has no affirmative duty to inform an opposing party of relevant facts. A misrepresentation can occur if the lawyer incorporates or affirms a statement of another person that the lawyer knows is false. Misrepresentation