so i went over the fence too. there was nothing there. >> a television newsman said he looked up just after the shot was fired and saw a rifle being withdrawn from a fifth or sixth floor window. >> it was originally thought that the shots came from in here. and now it is believed the shots came from this building here. >> the police officers are running back to the texas school book depository building. they are going to continue searching in that building for the would-be assassin of the president. >> in the federal downtown building, they are combing the floors of the texas book depository building in an effort to find the suspected assassin. >> in the building on the sixth floor we found an area near an area that had been partially blocked off by boxes of books and also the three spent shells that had apparently been fired from a rifle. >> crime lab lieutenant jayce