discovered a code. >> garrison said jack ruby's unlisted telephone number appears in address books belonging to shaw and oswald. >> you take p and o and use a telephone dial, p gives you 7, o gives you 6. >> he just changed the digits around, added digits, added letters. >> and you reconstruct the numbers, and then you subtract 1,300, and that gives you ruby's unlisted telephone number. >> mr. garrison, if the p.o. didn't exist until late '65, how could it then be jack ruby's phone number? >> well, that's a problem for you to think over because you, obviously, missed the point. >> he pointed to cia agents supporting a conspiracy. >> who is suppressing all of this information on whose order? >> i'll tell you who is suppressing it. the federal government is suppressing it. >> who in the federal government? >> the administration. the administration of your government is suppressing it because they know that the central intelligence agency --