Several associates and supporters of Mayor Eric Adams are expected to face corruption charges in the coming days, according to four people with knowledge of the matter, in cases that could serve as a potent reminder of the scandals still marring his mayoralty.
The mayor, who is just months away from facing voters in his bid for a second term leading New York City, is not expected to be charged. But the defendants, according to the people with knowledge of the matter, are expected to include his closest political ally and former chief adviser, Ingrid Lewis-Martin, and her son, both of whom are already facing corruption charges handed up late last year.
Also expected to face charges are the mayor’s friend Jesse Hamilton, a former state senator whom Mr. Adams installed in a powerful city job, and two influential supporters, Gina and Tony Argento, siblings who run a prominent soundstage company and who, with their employees, have donated more than $20,000 to Mr. Adams’s mayoral campaigns.
Details of the charges remain unclear. But the defendants are expected to surrender on Thursday morning to be arraigned on several indictments, the people said. The charges expected to be announced Thursday stem from the corruption investigation that led to the indictment last year against Ms. Lewis-Martin; her son, Glenn D. Martin II; and two businessmen.
Like the earlier indictment, the new charges are being brought by the office of the Manhattan district attorney, Alvin L. Bragg, and the city’s Department of Investigation.
The charges are expected to arrive as the mayor is desperately trying to revive his political image. Polls have consistently shown him lagging in a distant fourth place.
The latest accusations are expected to include at least one bribery scheme in which some of the defendants allegedly sought to influence policy through well-connected mayoral associates by supplying favors to Ms. Lewis-Martin, who has in the past called herself Mr. Adams’s “sister ordained by God.”
Ms. Lewis-Martin, who resigned last year days before the first indictment was announced, had been viewed as the second-most powerful person at City Hall and is believed to be at the center of all or most of the charges in the new case, some of the people said.
Arthur L. Aidala, a lawyer for Ms. Lewis-Martin, confirmed in a statement that she will be arraigned on Thursday and said that the district attorney had provided no details about the charges.
“She has always served the city with integrity, and she will firmly plead not guilty to every charge,” the statement said. “While the specifics remain unclear, Ingrid is certain of one thing — she has broken no laws, and she is not guilty.”
A lawyer for Mr. Hamilton, Mark Pollard, said his client “maintains that he is not guilty of whatever allegations are in this indictment,” adding that he “has served the city and state with honor and distinction as an elected-by-the-people district leader and state senator.”
Lawyers for the Argentos and for Ms. Lewis-Martin’s son did not respond to telephone and email messages seeking comment.
Spokeswomen for the district attorney’s office and the Department of Investigation also declined to comment.
This is a developing story and will be updated.