The brief filed by the PI documents his allegations with emails. At the time, in an email, he stated the quotes from him weren't what he said. Zimmerman's respinse was this is what management wants. So this is not some he said one thing at one time, changed his story later thing. He objected to them at the time, in a document. It also demonstrates not just that the story was false but she knew it was false. The technical term for that is lying.