The district attorney prosecuting Roman Polanski in Los Angeles has attacked the Swiss government's refusal to extradite the director.
District attorney Steve Cooley said he is "deeply disappointed" with the decision and will work with US officials to try to extradite Polanski if he is arrested again.
An arrest warrant on a 33-year-old sex case remains active in Los Angeles.
Polanski fled the United States on the eve of sentencing in 1978 after pleading guilty to one count of unlawful sexual intercourse with a 13-year-old girl.
Mr Cooley also said the Swiss decision is a "disservice to justice and other victims as a whole".
He said the department complied with every request made by Swiss and US authorities as part of the extradition process.