Although Los Angeles prosecutors could not charge Mr. Weinstein based on Ms. Battilana Guiterrez’s accusation because the events at issue did not happen in their jurisdiction, they hope her testimony will show a pattern of abuse. It is unclear how many other witnesses whose testimony could be used to establish such a pattern may be called.

The second accuser in the Los Angeles case is an Italian model and actress who has not been identified in court documents. She told prosecutors that she encountered Mr. Weinstein at a film festival in February 2013 and was shocked when he showed up at her door at the Mr. C luxury hotel in Beverly Hills.

According to a criminal complaint, Mr. Weinstein forced oral sex on her, then intercourse.

“He grabbed me by the hair and forced me to do something I did not want to do,” she told The Los Angeles Times in 2017. “He then dragged me to the bathroom and forcibly raped me.” She also told the newspaper: “It was the most demeaning thing ever done to me by far. He made me feel like an object, like nothing, with all his power.”

About a day later, on Feb. 19, 2013, Mr. Weinstein met with Ms. Young and a Mexican model, Claudia Salinas, at a lobby bar in the Montage Beverly Hills. Ms. Young testified at Mr. Weinstein’s trial in Manhattan that she believed she was going to a business meeting to discuss a script she had been working on.

Suddenly, she said, Mr. Weinstein said he had to prepare for an event with the director Quentin Tarantino and he told the women to accompany him to a suite at the hotel. Ms. Young said that she followed Mr. Weinstein into a bathroom as they talked and that Ms. Salinas shut the door, trapping her.

Ms. Salinas, who testified for the defense at the New York trial, denied being there and trapping Ms. Young in the bathroom with Mr. Weinstein.

Ms. Young said that Mr. Weinstein blocked the exit by opening a shower door. He then turned on the water, quickly undressed and stepped in and out of the shower, she said.