To confess; admit the truth.
1921, B. M. Bower, chapter 6, in Sawtooth Ranch
1977 Oct. 23, John Gardner, "The World Of Tolkien," New York Times (retrieved 12 Sept 2013)
2005 August 8, "Quotes of the Day," Time (retrieved 12 Sept 2013)
To lie, to be making false claims.
To report someone in authority for a wrongdoing.