Monday’s allegations were much more sweeping and were the result of what the committee chairman, Steven Matteo, a Staten Island councilman, said were the result of a “preliminary inquiry.” Mr. Matteo spoke during the brief public portion of a committee hearing that mostly took place behind closed doors.

Mr. King did not immediately respond to a text message sent to his cellphone.

Mr. Matteo, a Republican, said that the allegations included a new sexual harassment claim and “numerous instances of misuse of city resources.” He said that Mr. King was also accused of allowing his wife, Neva Shillingford-King, “to perform Council business” in violation of nepotism rules, and of “creating a work environment where his spouse was permitted to engage in harassment of a council employee.” The harassment allegation involving Mr. King’s wife did not appear, from Mr. Matteo’s comments, to be of a sexual nature.

Ms. Shillingford-King identifies herself on a LinkedIn account as being an executive at Local 1199 of the Service Employees International Union. A union spokesman said that he could not immediately confirm whether Ms. Shillingford-King was currently employed by the union.

Mr. Matteo also said that an employee in a supervisory role in Mr. King’s Council office was alleged to have “repeatedly threatened violence in the office and at work functions, and on at least one occasion the employee committed an act of violence against a subordinate employee.”

Mr. Matteo said that Mr. King had refused to cooperate with the committee’s inquiry or to be interviewed about the allegations.