All autobiographies and "as-told-to's" are self-serving. Mob autobiographies and "as-told-to's" are notoriously unreliable on top of that, for obvious reasons. Valachi's revelations were sensational at the time, but Valachi was a basic workin' stiff Mob guy, without much access to higher-ups. Maybe he really didn't know what happened? Or, maybe Maas didn't think the info was important enough to include--or his editors took it out?