Sorry, but nobody is going to convince me that Trask was just a 'misunderstood' man doing what he believes to be the right thing. I realize Vicki made herself all too obvious a suspect blabbing what was going to happen, but as others pointed out, she gained nothing from any of the weird things that had happened at Collinwood and Angelique did.
And, a man of God does not stoop to perjury and blackmail. Trask may have thought the end justified the means but that just proves how deluded he was. The Almighty does not look kindly on lies, Trask deliberately chose to turn a blind eye to that in order to get his witch.