William Julie (also styled William JULIE) is a French attorney at law (avocat a la cour) based in Paris who authored a formal expert opinion on French extradition law as Exhibit V in Ghislaine Maxwell's 2020 pre-trial bail proceedings. The opinion was commissioned by Olivier Laude of the French firm Laude Esquier Champey, acting on behalf of Cohen and Gresser LLP as counsel for Maxwell. Julie concluded that extradition of a French national to the United States is legally permissible under French law, that the 1996 US-France extradition treaty contains no prohibition on extraditing French nationals, and that Maxwell could lawfully be returned to the US from France if she fled.
The opinion accompanied an irrevocable waiver executed by Maxwell of any right to contest extradition through the French courts. Julie appears in approximately 20 documents across the released EFTA files.