In addition to interviews conducted exclusively for Crimelibrary, this piece draws on two federal court rulings:
Marshall v. Roy Hendricks, Honorable Joseph E. Irenas, Civil Action No. 97-5618 In the United States District Court of New Jersey
In addition, some material has been obtained from following sources:
Tunnel Vision, by Robert O. Marshall, published by
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Blind Faith by Joe McGinness, G.P Putnam and Sons, NY, 1989.