This is the post in question. Frankly, I'm not sure if that is true. I know there are cases where a crime has been very old, I believe more than 15 years old, and the person has still needed a waiver for a CIMT. I'm not sure how old or accurate that information is. I don't think Knight is a current member.
Have you consulted any attorneys? Laurel Scott comes highly recommended here for criminal waivers.