(a) A lawyer who has formerly represented a client in a matter shall not thereafter represent another person in the same or a substantially related matter in which that person's interests are materially adverse to the interests of the former client unless the former client gives informed consent, confirmed in writing.
(1) use information relating to the representation to the disadvantage of the former client except as these Rules would permit or require with respect to a client, or when the information has become generally known; or
(d) A lawyer shall not knowingly allow a support person to participate or assist in the representation of a current client in the same or a substantially related matter in which another lawyer or firm with which the support person formerly was associated had previously represented a client:
(e) If a support person, who has worked on a matter, is personally prohibited from working on a particular matter under Rule 1.9(d), the lawyer or firm with which that person is presently associated will not be prohibited from representing the current client in that matter if:
(2) the support person is screened from any personal participation in the matter to avoid communication to others in the firm of confidential information that both the support person and the firm have a legal duty to protect.
(f) For purposes of Rules 1.9(d) and (e), a support person shall mean any person, other than a lawyer, who is associated with a lawyer or a law firm and shall include but is not necessarily limited to the following: law clerks, paralegals, legal assistants, secretaries, messengers and other support personnel employed by the law firm. Whether one is a support person is to be determined by the status of the person at the time of the participation in the representation of the client.