Where were you last night , at exactly nine twenty PM ?   nine twenty pm , I couldn't say . I cann't remember .   Are you sure you cann't remember ?   I've absolutely certain .   Were you in or out ? Can you remember that ?   I'm not quite positive . I think I went out at about half pass nine .   Did you see anyone come into the block flats ?   No , I didn't .   Sure ?   Quite sure . 