vindicate (someone or oneself) of (something)
To clear someone or oneself of some guilt, accusation, blame, suspicion, etc.; to affirm or uphold someone's or one's own innocence or justification regarding something. This ruling vindicates him of criminal charges that extend back into the early 90s. I know she's eager to vindicate herself of the accusations laid against her. The soldiers were vindicated of using force to suppress rioters.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
vindicate someone of something
to clear or acquit someone of something. The police sought to vindicate Donald of the charges. They vindicated themselves of the charges with a clear alibi.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.