5 friends lived in a room

5 friends lived in a room,namely mad,brain,fool,somebody & nobody.
One day,somebody killed nobody.
That time brain was in bath room,
Mad called police.
Mad: is it police station?
Police: yes,what is the matter?
Mad: somebody killed nobody!
Police: are you mad?
Mad: yes, i am mad.
Police: don't you ha(.....)