I doubt the letters of the unvindicated who wrote, begging for a fresh look at the evidence, seemed any less sincere.
How many have gone the way whence they shall not return, unheard apparently, unvindicated, hidden in calumny and shame!
1620s, "to avenge or revenge," from Latin vindicatus, past participle of vindicare (see vindication). Meaning "to clear from censure or doubt, by means of demonstration" is recorded from 1630s. Related: Vindicated, vindicating.