Who does the Lord call "a wicked man" in Section 3 of the Doctrine and Covenants?

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Martin Harris

Thou [Joseph Smith] deliveredst up that which God had given thee sight and power to translate [The Book of Mormon], thou deliveredst up that which was sacred into the hands of a wicked man [Martin Harris]. Section 3:12

(Although the text doesn't name the "wicked man", every Mormon knows who the Lord is talking about here.)