A former City Hall aide charged with tampering with witnesses in the federal corruption investigation into Mayor Eric Adams is talking with prosecutors about a potential guilty plea — raising the possibility that he might cooperate with them against the mayor.

The discussions were cited in court papers filed on Wednesday in Federal District Court in Manhattan, but it is unclear whether the talks will result in a plea, and the papers did not indicate whether any possible deal might involve cooperation and testimony against the mayor. Mr. Adams’s trial is scheduled for April 21.

It is not unusual for prosecutors to offer leniency to potential witnesses against the targets of investigations, and the criminal complaint charging the aide, Mohamed Bahi, suggests the case is strong enough that he might well consider such an agreement if he has evidence of value to the government.

Mr. Bahi, 40, served as a City Hall liaison to New York’s Muslim community until he resigned on Oct. 7, the day before he was arrested on federal charges of witness tampering and destruction of evidence.

One of the prosecutors in the case against Mr. Bahi, Derek Wikstrom, filed the papers to ask the U.S. magistrate judge handling the case to give prosecutors and Mr. Bahi’s lawyer more time to discuss a possible plea. Mr. Bahi’s lawyer, Derek Adams, has consented to the request for more time, Mr. Wikstrom wrote. Mr. Bahi is being prosecuted separately from Mr. Adams.