One out of the six sexual assault charges leveled against Hollywood movie producer Harvey Weinstein has been dismissed by a judge in New York.
Prosecutors said actress Lucia Evans, one of the complainants had given a witness a different version of the alleged sex assault from the one she had given them.
Evans has told US media that Weinstein forced her to perform oral sex on him in 2004.
Five charges involving alleged sex assaults on two women remain. Weinstein has denied all the charges.
Weinstein's lawyer, Benjamin Brafman, said he would seek to have the remaining charges dismissed as well.
Brafman also said he would investigate what he said had been 'perjury' before the grand jury which indicted Weinstein, as well as the conduct of a New York police officer who had worked on the case.
After the hearing, the Manhattan district attorney's office released a letter it had sent to Brafman last month which said that a witness had told prosecutors that she had heard a version of the alleged assault from Evans that was different from the account Ms Evans had originally given prosecutors.
The witness had given the different account to a New York police officer who had failed to tell prosecutors, the letter added.
Evans's lawyer, Carrie Goldberg, said her client's account of events had been accurate.
"I want to be very clear that prosecutors' decision to abandon my client's claims does not invalidate the truth of her claims," Goldberg said.
Weinstein has been accused of sexual misconduct by more than 70 women.