Since then, a third case has surfaced: He is accused of coercing a woman to have sex with him in 2006 by claiming he could help her cousin, who had recently been arrested on drug charges.

Detective Sandino faces three misdemeanor counts of depriving the women of their civil rights and faces a maximum of three years in prison. He was released on $250,000 bond. He also faces misdemeanor charges of official misconduct and second degree harassment in State Supreme Court in Brooklyn stemming from the episode at central booking in 2009.

A lawyer for Detective Sandino, Peter E. Brill, denied the accusations, which he called “old news.”

In Mr. Rosario’s trial, one woman told her story publicly for the first time from the witness stand on Tuesday. The woman, a 29-year-old mother of one, testified that Mr. Rosario had lured her with promises to give her applications, for a job as a crossing guard and for after-school programs for her son.

Image Wilfredo Rosario, a former police officer, left, with his lawyer, Steven R. Fusfeld, on Tuesday. Credit... John Marshall Mantel for The New York Times

When he arrived at her apartment building with the applications on the night of March 30, 2008, she said, he told her to get into his car so he could explain the applications. They were in English, and she speaks only Spanish.

But once she got into the car, she testified through an interpreter, he began driving and telling her, “Don’t be afraid.” He eventually stopped the car, told her he wanted to feel her heart and groped her breast, she said.

After she pushed his hand away, she said, he showed her a necklace that she believed to be associated with Santeria. The woman testified that Mr. Rosario said the necklace “gave him the power to feel people” and said he could tell that she “had suffered a lot in this lifetime.” He told her he wanted to help her, she said.