User blog comment:Plainblack/Doflamingo's Spade Knight/@comment-94.68.165.51-20130331172233

Chapter 673, Page 17.

Law speaking about Vergo and saying:

"There is no marine officer more convenient and trustworthy to Joker than him."

Someone can argue that this is proof against this theory, but we all should agree that the statement makes the theory highly unlike.