Almost the whole line of people pushed forward when Oswald started to leave the jail office, the door, the hall--all the newsmen were poking their sound mikes across to him and asking questions, and they were everyone sticking their flashbulbs up and around and over him and in his face.[C5-137] After Oswald had moved about 10 feet from the door of the jail office, Jack Ruby passed between a newsman and a detective at the edge of the straining crowd on the Main Street ramp. With his right hand extended and holding a .38 caliber revolver, Ruby stepped quickly forward and fired a single fatal bullet into Oswald’s abdomen.[C5-138] (See Commission Exhibit No. 2636, p. 218.) POSSIBLE ASSISTANCE TO JACK RUBY IN ENTERING THE BASEMENT The killing of Lee Harvey Oswald in the basement of police headquarters in the midst of more than 70 police officers gave rise to immediate speculation that one or more members of the police department provided Jack Ruby assistance which had enabled him to enter the basement and approach within a few feet of the accused Presidential assassin. In chapter VI, the Commission has considered whether there is any evidence linking Jack Ruby with a conspiracy to kill the President. At this point, however, it is appropriate to consider whether there is evidence that Jack Ruby received assistance from Dallas policemen or others in gaining access to the basement on the morning of November 24. An affirmative answer would require that the evidence be evaluated for possible connection with the assassination itself. While the Commission has found no evidence that Ruby received assistance from any person in entering the basement, his means of entry is significant in evaluating the adequacy of the precautions taken to protect Oswald. [Illustration: COMMISSION EXHIBIT NO. 2177 JAIL OFFICE AND IMMEDIATE VICINITY BASEMENT, DALLAS POLICE DEPARTMENT] [Illustration: COMMISSION EXHIBIT NO. 2636 Ruby shooting Oswald (Sunday, November 24).] Although more than a hundred policemen and newsmen were present in the basement of police headquarters during the 10 minutes before the shooting of Oswald, none has been found who definitely observed Jack Ruby’s entry into the basement. After considering all the evidence, the Commission has concluded that Ruby entered the basement unaided, probably via the Main Street ramp, and no more than 3 minutes before the shooting of Oswald.