During the period between 2:30 p.m. on Friday afternoon and 11:15 a.m. Sunday morning, Oswald was interrogated for a total of approximately 12 hours.[C5-30] Though subject to intermittent questioning for more than 7 hours on Friday, Oswald was given 8 to 9 hours to rest that night. On Saturday he was questioned for a total of only 3 hours during three interrogation sessions, and on Sunday he was questioned for less than 2 hours.[C5-31] (These interrogations are discussed in ch. IV.) Captain Fritz’ office, within which the interrogations took place, was a small room, 14 feet by 9½ feet in size.[C5-32] In addition to the policemen guarding the prisoner, those present usually included Dallas detectives, investigators from the FBI and the Secret Service, and occasionally other officials, particularly a post office inspector and the U.S. marshal. (See statements in app. XI.) As many as seven or eight people crowded into the small office.[C5-33] In all, more than 25 different persons participated in or were present at some time during interrogations. Captain Fritz, who conducted most of the interrogations, was frequently called from the room. He said, “I don’t believe there was any time when I went through a very long period without having to step to the door, or step outside, to get a report from some pair of officers, or to give them additional assignments.”[C5-34] In his absence, others present would occasionally question Oswald.[C5-35] The interrogators differ on whether the confusion prevailing in the main third floor corridor penetrated Fritz’ office and affected the atmosphere within.[C5-36] Oswald’s processions through the third floor corridor, described more fully below, tended, in Fritz’ opinion, to keep Oswald upset, and the remarks and questions of newsmen sometimes caused him to become annoyed. Despite the confusion that frequently prevailed, Oswald remained calm most of the time during the interrogations.[C5-37] According to Captain Fritz: You know I didn’t have trouble with him. If we would just talk to him quietly like we are talking right now, we talked all right until I asked him a question that meant something, every time I asked him a question that meant something, that would produce evidence he immediately told me he wouldn’t tell me about it and he seemed to anticipate what I was going to ask.[C5-38] Special Agent James W. Bookhout, who represented the FBI at most of the interrogations, stated, “I think generally you might say anytime that you asked a question that would be pertinent to the investigation, that would be the type of question he would refuse to discuss.”[C5-39]