Sgt. D. V. Harkness of the Dallas police said that to his knowledge the building was not sealed off at 12:36 p.m. when he called in on police radio that a witness (Amos Euins) had seen shots fired from a window of the building.[C4-404] At that time, Inspector Herbert V. Sawyer’s car was parked in front of the building.[C4-405] Harkness did not know whether or not two officers with Sawyer were guarding the doors.[C4-406] At 12:34 p.m. Sawyer heard a call over the police radio that the shots had come from the Depository Building.[C4-407] He then entered the building and took the front passenger elevator as far as it would go--the fourth floor.[C4-408] After inspecting this floor, Sawyer returned to the street about 3 minutes after he entered the building.[C4-409] After he returned to the street he directed Sergeant Harkness to station two patrolmen at the front door and not let anyone in or out; he also directed that the back door be sealed off.[C4-410] This was no earlier than 12:37 p.m.[C4-411] and may have been later. Special Agent Forrest V. Sorrels of the Secret Service, who had been in the motorcade, testified that after driving to Parkland Hospital, he returned to the Depository Building about 20 minutes after the shooting, found no police officers at the rear door and was able to enter through this door without identifying himself.[C4-412] Although Oswald probably left the building at about 12:33 p.m., his absence was not noticed until at least one-half hour later. Truly, who had returned with Patrolman Baker from the roof, saw the police questioning the warehouse employees. Approximately 15 men worked in the warehouse[C4-413] and Truly noticed that Oswald was not among those being questioned.[C4-414] Satisfying himself that Oswald was missing, Truly obtained Oswald’s address, phone number, and description from his employment application card. The address listed was for the Paine home in Irving. Truly gave this information to Captain Fritz who was on the sixth floor at the time[C4-415]. Truly estimated that he gave this information to Fritz about 15 or 20 minutes after the shots,[C4-416] but it was probably no earlier than 1:22 p.m., the time when the rifle was found. Fritz believed that he learned of Oswald’s absence after the rifle was found.[C4-417] The fact that Truly found Fritz in the northwest corner of the floor, near the point where the rifle was found, supports Fritz’ recollection. Conclusion