Crime Story!!

This is crime story. Five friends lived in a room, Namely MAD, BRAIN, FOOL, NOBODY, SOMEBODY.
One day SOMEBODY killed NOBODY. At that time BRAIN was in bathroom, 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"m MAD.
Police: Don`t you have BRAIN.
MAD: BRAIN is in bathroom....
Police: you FOOL...
MAD: No, FOOL is reading this joke...

Who is he?

There's a man is in the hospital, a friend walks in, then a priest walks in and the man leaves, the priest asks who that was, the man says" Brothers and Sisters I have none, but he's my Fathers Fathers son, who is he?