At the scene of the shooting, there was evident confusion at the outset concerning the point of origin of the shots. Witnesses differed in their accounts of the direction from which the sound of the shots emanated. Within a few minutes, however, attention centered on the Texas School Book Depository Building as the source of the shots. The building was occupied by a private corporation, the Texas School Book Depository Co., which distributed school textbooks of several publishers and leased space to representatives of the publishers. Most of the employees in the building worked for these publishers. The balance, including a 15-man warehousing crew, were employees of the Texas School Book Depository Co. itself. Several eyewitnesses in front of the building reported that they saw a rifle being fired from the southeast corner window on the sixth floor of the Texas School Book Depository. One eyewitness, Howard L. Brennan, had been watching the parade from a point on Elm Street directly opposite and facing the building. He promptly told a policeman that he had seen a slender man, about 5 feet 10 inches, in his early thirties, take deliberate aim from the sixth-floor corner window and fire a rifle in the direction of the President’s car. Brennan thought he might be able to identify the man since he had noticed him in the window a few minutes before the motorcade made the turn onto Elm Street. At 12:34 p.m., the Dallas police radio mentioned the Depository Building as a possible source of the shots, and at 12:45 p.m., the police radio broadcast a description of the suspected assassin based primarily on Brennan’s observations. When the shots were fired, a Dallas motorcycle patrolman, Marrion L. Baker, was riding in the motorcade at a point several cars behind the President. He had turned right from Main Street onto Houston Street and was about 200 feet south of Elm Street when he heard a shot. Baker, having recently returned from a week of deer hunting, was certain the shot came from a high-powered rifle. He looked up and saw pigeons scattering in the air from their perches on the Texas School Book Depository Building. He raced his motorcycle to the building, dismounted, scanned the area to the west and pushed his way through the spectators toward the entrance. There he encountered Roy Truly, the building superintendent, who offered Baker his help. They entered the building, and ran toward the two elevators in the rear. Finding that both elevators were on an upper floor, they dashed up the stairs. Not more than 2 minutes had elapsed since the shooting.