Actress Paz de la Huerta says that in October of 2010, Weinstein offered to give her a ride home to her New York City apartment, after a party, because the two lived in the same neighborhood.
The NYPD said they became aware of the claim on October 25 and would have arrested Mr Weinstein, who is now in Arizona, already had he been in NY.
"He pushed me on the bed... and it happened all very suddenly", she told CBS News over the phone.
Boyce said detectives found the "Boardwalk Empire" actress' story believable and that two people corroborated portions of her account.
"If this person was still in NY, and it was recent, we'd go right away and make the arrest".
A warrant requires a court order, Boyce said.
Boyce told reporters Friday that because this impending case dates back seven years, an arrest of Weinstein couldn't be made immediately.
But he said that since Weinstein is in another state and the allegations are years old, investigators have to gather evidence first.
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Shiraishi's neighbors expressed shock and disbelief at the news that nine bodies had been discovered in his apartment. A police official said a toolbox and saw found in Shiraishi's apartment may have been used to dismember the bodies.
De la Huerta's allegations are at least the third Weinstein case to have been investigated by NY police in recent years.
"I was in no state", she said. "The investigation is on-going".
The Manhattan district attorney has also assigned a senior sex crimes prosecutor to the case, working in collaboration with NY police, his office confirmed.
The Associated Press does not typically identify people who say they are victims of sexual assault unless they speak publicly, which de la Huerta and Guiterrez have done.
PEOPLE magazine reports there are 65 women who have accused Weinstein of sexual misconduct.
"The office has been working with our partners in the NYPD since the new allegations came to light", Vollero said.
Weinstein's spokeswoman told Vanity Fair that the film producer "unequivocally denied" all allegations of nonconsensual sex.