Verb (used with object), : He was exonerated from the accusation of cheating.    From Dictionary.com. 

“This usage,” he said, “should be referred to as the past exonerative.”.    From Wordnik.com.  [Tactical Retreat] Reference

WILLIAM SCHNEIDER, CNN SENIOR POLITICAL ANALYST: They have coined a whole new grammatical tense in Washington, which is the past exonerative.    From Wordnik.com.  [CNN Transcript Mar 14, 2007] Reference

His civil case, in which he seeks damages from the Kenyan Government for his ordeal, is up this week, although thanks to a limp judicial system no one expects a very exonerative outcome.    From Wordnik.com.  [Kenya: Now or Never « Gender Across Borders] Reference