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Colorado Disciplinary Rules of Professional Conduct
Comment - Rule 1.6
 The lawyer is part of a judicial system charged with upholding the law. One of the lawyer's functions is to advise clients so that they avoid any violation of the law in the proper exercise of their rights.
 The observance of the ethical obligation of a lawyer to hold inviolate confidential information of the client not only facilitates the full development of facts essential to proper representation of the client but also encourages people to seek early legal assistance.
 Almost without exception, clients come to lawyers in order to determine what their rights are and what is, in the maze of laws and regulations, deemed to be legal and correct. The common law recognizes the client's confidences must be protected from disclosure. Based upon experience, lawyers know that almost all clients follow the advice given, and the law is upheld.
 A fundamental principle in the client-lawyer relationship is that the lawyer maintain confidentiality of information relating to the representation. The client is thereby encouraged to communicate fully and frankly with the lawyer even as to embarrassing or legally damaging subject matter.
 The principle of confidentiality is given effect in two related bodies of law, the attorney-client privilege (which includes the work product doctrine) in the law of evidence and the rule of confidentiality established in professional ethics. The attorney-client privilege applies in judicial and other proceedings in which a lawyer may be called as a witness or otherwise required to produce evidence concerning a client. The rule of client-lawyer confidentiality applies in situations other than those where evidence is sought from the lawyer through compulsion of law. The confidentiality rule applies not merely to matters communicated in confidence by the client but also to all information relating to the representation, whatever its source. A lawyer may not disclose such information except as authorized or required by the Rules of Professional Conduct or other law.
 The attorney-client privilege is more limited than the ethical obligation of a lawyer to guard confidential information of the client. This ethical precept, unlike the evidentiary privilege, exists without regard to the nature or source of information or the fact that others share the knowledge. A lawyer should endeavor to act in a manner which preserves the evidentiary privilege; for example, the lawyer should avoid professional discussion in the presence of persons to whom the privilege does not extend. A lawyer owes an obligation to advise the client of the attorney-client privilege and timely to assert the privilege unless it is waived by the client. See also Scope.
 The requirement of maintaining confidentiality of information relating to representation applies to government lawyers who may disagree with the policy goals that their representation is designed to advance.
 A lawyer is impliedly authorized to make disclosures about a client when appropriate in carrying out the representation, except to the extent that the client's instructions or special circumstances limit that authority. In litigation, for example, a lawyer may disclose information by admitting a fact that cannot properly be disputed, or in negotiation by making a disclosure that facilitates a satisfactory conclusion.
 Lawyers in a firm, may in the course of the firm's practice, disclose to each other information relating to a client of the firm, unless the client has instructed that particular information be confined to specified lawyers.
Disclosure Adverse to Client
 The confidentiality rule is subject to limited exceptions. In becoming privy to information about a client, a lawyer may foresee that the client intends to commit a crime. However, to the extent a lawyer is required or permitted to disclose a client's purposes, the client will be inhibited from revealing facts which would enable the lawyer to counsel against a wrongful course of action. The public is better protected if full and open communication by the client is encouraged than if it is inhibited.
 Similarly, a lawyer has a duty under Rule 3.3(a)(4) not to use false evidence. This duty is essentially a special instance of the duty prescribed in Rule 1.2(d) to avoid assisting a client in criminal or fraudulent conduct.
 Second, the lawyer may have been innocently involved in past conduct by the client that was criminal or fraudulent. In such a situation the lawyer has not violated Rule 1.2(d), because to "counsel or assist" criminal or fraudulent conduct requires knowing that the conduct is of that character.
 Third, the lawyer may learn that a client intends prospective conduct that is criminal and likely to result in imminent death or substantial bodily harm. As stated in paragraph (b), the lawyer has professional discretion to reveal information in order to prevent such consequences.
 The lawyer's exercise of discretion requires consideration of such factors as the nature of the lawyer's relationship with the client and with those who might be injured by the client, the lawyer's own involvement in the transaction and factors that may extenuate the conduct in question. Where practical, the lawyer should seek to persuade the client to take suitable action. In any case, a disclosure adverse to the client's interest should be no greater than the lawyer reasonably believes necessary to the purpose. A lawyer's decision not to take preventive action permitted by paragraph (b) does not violate this Rule.
 After withdrawal the lawyer is required to refrain from making disclosure of the clients' confidences, except as otherwise provided in Rule 1.6. Neither this Rule nor Rule 1.8(b) nor Rule 1.16(d) prevents the lawyer from giving notice of the fact of withdrawal, and the lawyer may also withdraw or disaffirm any opinion, document, affirmation, or the like.
 Where the client is an organization, the lawyer may be in doubt whether contemplated conduct will actually be carried out by the organization. Where necessary to guide conduct in connection with this Rule, the lawyer may make inquiry within the organization as indicated in Rule 1.13(b).
Dispute Concerning Lawyer's Conduct
 Where a legal claim or disciplinary charge alleges complicity of the lawyer in a client's conduct or other misconduct of the lawyer involving representation of the client, the lawyer may respond to the extent the lawyer reasonably believes necessary to establish a defense. The same is true with respect to a claim involving the conduct or representation of a former client. The lawyer's right to respond arises when an assertion of such complicity has been made. Paragraph (c) does not require the lawyer to await the commencement of an action or proceeding that charges such complicity, so that the defense may be established by responding directly to a third party who has made such an assertion. The right to defend, of course, applies where a proceeding has been commenced. Where practicable and not prejudicial to the lawyer's ability to establish the defense, the lawyer should advise the client of the third party's assertion and request that the client respond appropriately. In any event, disclosure should be no greater than the lawyer reasonably believes is necessary to vindicate innocence, the disclosure should be made in a manner which limits access to the information to the tribunal or other persons having a need to know it, and appropriate protective orders or other arrangements should be sought by the lawyer to the fullest extent practicable.
 If the lawyer is charged with wrongdoing in which the client's conduct is implicated, the rule of confidentiality should not prevent the lawyer from defending against the charge. Such a charge can arise in a civil, criminal or professional disciplinary proceeding, and can be based on a wrong allegedly committed by the lawyer against the client, or on a wrong alleged by a third person; for example, a person claiming to have been defrauded by the lawyer and client acting together. A lawyer entitled to a fee is permitted by paragraph (c) to prove the services rendered in an action to collect it. This aspect of the rule expresses the principle that the beneficiary of a fiduciary relationship may not exploit it to the detriment of the fiduciary. As stated above, the lawyer must make every effort practicable to avoid unnecessary disclosure of information relating to a representation, to limit disclosure to those having the need to know it, and to obtain protective orders or make other arrangements minimizing the risk of disclosure.
Disclosures Otherwise Required or Authorized
 The attorney-client privilege is differently defined in various jurisdictions. If a lawyer is called as a witness to give testimony concerning a client, absent waiver by the client, paragraph (a) requires the lawyer to invoke the privilege when it is applicable. The lawyer must comply with the final orders of a court or other tribunal of competent jurisdiction requiring the lawyer to give information about the client.
 The Rules of Professional Conduct in various circumstances permit or require a lawyer to disclose information relating to the representation. See Rules 2.2, 2.3, 3.3 and 4.1. In addition to these provisions, a lawyer may be obligated or permitted by other provisions of law to give information about a client. Whether another provision of law supersedes Rule 1.6 is a matter of interpretation beyond the scope of these Rules, but a presumption should exist against such a supersession.
 This Rule raises the delicate and complicated question of the balance between a lawyer's responsibility to keep clients' confidences inviolate and the scope of permissible disclosure of such information in particular instances. Rule 1.6 as proposed by the Committee sets forth the broader scope of permissive disclosure as provided in DR 4-101(c)(3) rather than the more limited scope of such disclosure as contained in the Proposed Model Rules. EC 4-4 has been included in the comments to further explain the distinction between the evidentiary attorney-client privilege and the principle of confidentiality. Subparagraph (d) of the Rule is comparable to DR 4-101(D) and is intended to amplify Rule 5.3.