So Oswald hears the shots and goes into a panic mode knowing that he has a rifle on the 6th floor so the only thing he can do is go get a coke in the break room where he will be confronted by a cop with a handgun and of course Truly will tell the policeman that Oswald works at the TSBD . I know that was just a scenario but that Walt Brown sets up quite a theory . Hear the shots , remember your rifle is on the 6th floor , then just mosey on down and get yourself a coke before having a cop pull his weapon on you . Case Closed . I bought all those books for nothing .