To be dead to the Law means to be free of the Law.
 Martin Luther, Commentary on the Epistle to the Galatians (1535). copy citation

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Author Martin Luther
Source Commentary on the Epistle to the Galatians
Topic meaning
Date 1535
Language English
Reference
Note Translated by Theodore Graebner
Weblink http://www.gutenberg.org/files/1549/1549-h/1549-h.htm

Context

“"I have nothing to do with the Law," cries Paul. He could not have uttered anything more devastating to the prestige of the Law. He declares that he does not care for the Law, that he does not intend ever to be justified by the Law. To be dead to the Law means to be free of the Law. What right, then, has the Law to accuse me, or to hold anything against me? When you see a person squirming in the clutches of the Law, say to him: "Brother, get things straight. You let the Law talk to your conscience.” source