The television special was to air on two of the final three nights of the November sweeps, when ratings are watched closely to set local advertising rates. It has been a particularly tough fall for Fox, which has seen none of its new shows catch on and is waiting for the January bows of "American Idol" and "24."

The closest precedent for such an about-face came when CBS yanked a miniseries about Ronald Reagan from its schedule in 2003 when complaints were raised about its accuracy. The Reagan series was seen on its sister premium-cable channel, Showtime, instead.

One station manager who had said he wasn't airing the special said he was concerned that whether or not Simpson was guilty, he'd still be profiting from murders.

"I have my own moral compass and this was easy," said Bill Lamb, general manager of WDRB in Louisville.

For the publishing industry, the cancellation of "If I Did It" was an astonishing end to a story like no other. Numerous books have been withdrawn over the years because of possible plagiarism, most recently Kaavya Viswanathan's "How Opal Mehta Got Kissed, Got Wild, and Got a Life," but a book's removal simply for objectionable content is virtually unheard of.

Sales had been strong, but not sensational. "If I Did It" cracked the top 20 of Amazon.com last weekend, but by Monday afternoon, at the time its cancellation had been announced, the book had fallen to No. 51.

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