Hubbard nonetheless remained active in the management of Scientology. The criminal conviction of the GO's top executives triggered a lengthy power struggle at the top of the Church of Scientology, which would lead eventually to Mary Sue being forced into retirement. Under his doctrine he believed that "mistakes do not just happen, somebody causes them, always". A disaster on the scale of the GO criminal case was clearly the result of the activities of someone hostile to Scientology – a Suppressive Person – operating within the GO. He issued an internal directive in 1979 asserting that major failures must result from the presence of multiple Suppressives, who would need to be rooted out along with their "connections". The downfall of the GO led Hubbard to distrust it, believing it to be riddled with Suppressives; he severed his communications with it and put his reliance instead on the Commodore's Messenger Organization (CMO), a group which he had formed in 1968 whose purpose was to relay messages to and from church staff as Ron's personal representatives. The Messengers, who were mostly in their teens and early twenties, became Hubbard's sole means of communication with the Church.