According to Model Rule 3.3, this rule. requires lawyers must take "reasonable remedial measures" when they come to know evidence is false. According to Model Rule 1.6 (b) (1), this rule. allows a lawyer, in certain narrowly defined circumstances, to disclose confidential client information to prevent future harm.
a lawyer is to act with reasonable diligence and promptness when representing a client. If the lawyer has accepted a criminal case but then finds out that the client is clearly guilty but wants to fight the charges, the lawyer. can continue and require that the prosecution prove the case beyond a reasonable doubt.