Explain why burr was not guilty of treason in marshall's view

Burr was not guilty of treason because he had not engaged in an overt act, which was a requirement of treason as specified by the U. S. Constitution.

Because, factual evidence was lacking.

Explanation:

Mr. Burr wasn't guilty because there was no evidence to prove that the commit treason. The merely 'intention' of treason was not enough to find him guilty,