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I did not know that!
That's the word. His 'friends' name was Jim Sheil and he died in 2013. Here's a piece from his wiki page...
Napolitano's longtime friend James C. Sheil died on March 19, 2013.[39] In the Acknowledgements section of his book Suicide Pact: The Radical Expansion of Presidential Powers and the Lethal Threat to American Liberty, Napolitano states: "... my happy dreams turned dark last year when Jim Sheil, my alter ego to whose memory this book is dedicated, died suddenly on March 19th 2013, as we were working on this book. Jim and I shared much of our lives with each other. Among that which we shared was a love of the printed word. Yet our philosophies and politics were like oil and water."[40]