 CONT: Oscar goes down in the elevator a few meters before the  corridor turns right and after a flight of stairs. But when Elliot  Ness realises something is wrong he runs down these stairs. Police  Chief Mike Dorsett goes into his office at the end of the said  hallway and looks out of his window which is situated on the line of  the corridor and sees the assailant who killed Oscar and the  witness. This mistake in essence means that the lift shaft moved 100  yards along the line of the corridor.