The 46-page document outlines numerous claims, including those originally made in the Dec. 22 email.
Mr. Katz did not respond to request for comment.
(His auto-reply message indicated that he was out sick.)

Credit: Jamie McCarthy/Getty Images
Here is what is true: The allegations of rape are ludicrous, and untrue.
The suggestion that there was is disseminating a lie.
An in-depth independent investigation by experienced and highly regarded lawyers was conducted and I was completely exonerated.
There was no basis for the allegations and once again I deny them unequivocally.
I informed the then Board Chair and Executive Committee of my decision.
At no time did I ever demand a $750,000 consulting fee.
I will vigorously defend all false claims made against me in this document.
Per Dugan, the artist ended up with a nod, despite ranking near the bottom.
The Recording Academy responded to this and the filing of the complaint with a statement of their own.
Both of these investigations remain ongoing.
Dugans legal team quickly responded to the statement, refuting the Academys claims.
In addition, it is not just Ms. Dugan who has raised concerns.
The statement also claims the Academys repeated leaks and disclosures of information forced this issue into the public eye.
The Board Chair demanded an answer within the hour.
Duganrefused to accept and walk away, she was put on leave.
That is not a credible story.
We and Ms. Dugan stand behind her EEOC charge 100%.
They continued, Mr. Portnow denies demanding $750,000 for a consultancy.
However, Ms. Dugans charge does not allege that he made such a demand.
The Executive Committee is trying to paint Ms. Dugan as a money-hungry liar.
Nothing could be further from the truth.
This is an ongoing story.