Because he's the only one who escaped the chamber.
He threw them off their tracks.
G- Pretty well, Do you want me to walk you back? B- walk me back? G- to the friendzone you just tried to escape.
Boo, DUH!!!
Santa.
By putting flowers on the grave.
With a search party.
Heinrich Potter, and the chamber of gas.
Russian roulette, except with a full chamber.