A close friend and senior adviser to Mayor Eric Adams was vulgar and abusive toward female subordinates, referred to a gay police official using a homophobic slur and denied a woman a promotion because she resisted his suggestion that they engage in a “quid pro quo sexual relationship,” a high-ranking New York Police Department official charges in a lawsuit filed on Tuesday.

The adviser, Timothy Pearson, also once sexually abused a female pastor, manipulated her into having sex with him and was abusive during the encounter about 10 years ago — prompting her to file a criminal complaint against him, the suit says.

The lawsuit is the fourth action this year to accuse Mr. Pearson of sexual harassment. Like two of the others, it was brought by a male police official who said he was disgusted by Mr. Pearson’s treatment of women at a small unit Mr. Adams created to improve government efficiency.

Mr. Pearson declined to comment, referring a reporter to a City Hall spokeswoman and a lawyer the city has hired to represent him. That lawyer denied any wrongdoing on Mr. Pearson’s behalf and said he would vigorously defend him and the city against the claims.

The latest complaint, filed in State Supreme Court in Manhattan, was brought by a veteran deputy police chief, Miltiadis Marmara, who has been on the force for more than three decades and who knew Mr. Pearson before Mr. Pearson retired and became head of security at a casino in Queens.

But Mr. Pearson has not just been accused of wrongdoing in lawsuits. He has also come under scrutiny for apparent conflicts of interest and allegations that he abused the authority of his position in city government. He is the subject of two ongoing investigations by the city’s independent anti-corruption agency, people with knowledge of the matter have said. One is examining the sexual harassment allegations and the other his role in a violent melee in October at a city migrant shelter.