Judith Regan publicly defended the controversial book project, If I Did It--in which the former football star hypothetically discussed how he would have killed his wife Nicole and her friend Ron Goldman.
However, the families of the deceased pleaded with Regan to shelve the plans to publish the biography.
She was fired last weekend by HarperCollins, a Murdoch News Corporation-owned company, but Regan insists she will not go quietly and has hired Hollywood's feared celebrity lawyer Bert Fields to help her fight.
He says, "They've chosen war and they will get exactly that."
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