What is the lawyer's responsibility if they know evidence is false?

The obligation of a lawyer when they become aware that evidence is false is grounded in their ethical duty to the court and the legal system. A lawyer must take action to prevent the introduction of false evidence to maintain the integrity of the judicial process. This duty includes not allowing their client to present false evidence and taking steps to rectify the situation, which could involve discussing the matter with the client and potentially withdrawing from the case if necessary.

In criminal cases, for example, presenting false evidence can amount to a severe breach of ethical responsibilities, potentially undermining the fairness of the trial. Thus, the lawyer's role is not merely to advocate for the client but also to uphold the law and ensure that justice is served, which includes refusing to facilitate any attempts to mislead the court.

This response reinforces the key principle that lawyers are officers of the court, responsible for upholding the truth and ensuring justice, rather than simply acting as mouthpieces for their clients.