What is required of an attorney in terms of involvement when they are screened from a case?

In a situation where an attorney is screened from a case, complete disengagement is indeed required. The purpose of screening in this context is to prevent any potential conflicts of interest that could arise from an attorney's prior involvement or relationship with a party involved in the case. By completely disengaging, the attorney ensures that they do not have access to any confidential information pertaining to the matter and cannot influence the case in any way, either directly or indirectly.

This level of separation is essential to maintain the integrity of the legal process and to uphold the ethical standards of the profession. It also protects the rights and interests of all parties involved, ensuring that the attorney's previous connections do not compromise the case's fairness.

In contrast, the other choices imply some level of involvement or communication regarding the case, which would contradict the purpose of screening and risk breaching confidentiality. The requirement for an attorney who is screened is to avoid any participation or influence in the case, maintaining a strict boundary to ensure ethical compliance.