Fenjves collaborated with O. J. Simpson to ghostwrite "If I Did It", an account of the O. J. Simpson murder case. The book was pulled by the publisher just weeks before its release date, but it was subsequently revived by Fred Goldman, father of murder victim Ron Goldman, and spent five weeks on "The New York Times" Best Seller list. Fenjves had a personal connection to the Simpson case: Fenjves lived a few doors down from the Brentwood murder scene, and had testified against Simpson regarding the time at which he heard Nicole Simpson's dog barking.