Kurt Sonnenfeld moved to Argentina in 2003 after prosecutors in Denver charged him with first-degree murder. The decision to extradite him brings to an end a longstanding dispute between the U.S. Justice Department and Argentine courts that centered in part on differences over the death penalty.
In the ruling, which was made Dec. 11, the justices said U.S. Prosecutors had assured Argentina that "the death penalty will not be imposed, or if it were ruled, it will not be exercised in this case." The ruling does not specify when the extradition may take place.
Denver district attorney spokeswoman Lynn Kimbrough referred questions to the U.S. Department of Justice, which said it does not comment on matters of extradition until a defendant is in the United States.
Sonnenfeld had been a cameraman for the Federal Emergency Management Agency at the World Trade Center after the Sept. 11, 2001, terrorist attacks and claimed he had video footage indicating the government knew the attacks would happen.
Sonnenfeld, who published a book in Spanish about his case, "El Perseguido," or "The Persecuted," had a following of fellow conspiracy theorists. On a Facebook page dedicated to him, a long post in Spanish published late Friday lamented Argentina's decision and recounted Sonnenfeld's claim that he was framed.
According to the page, Sonnenfeld remarried in Argentina and has twin daughters. Several private messages sent to the page Saturday were not immediately returned.