How Did Adolf Hitler Die? it can`t of been suicide?

ok i`ve been watching the history channel most my life but come on suicide i don`t believe it why wasn`t his ashes recovered how do we know the guards or valet was telling the truth he was sworn to serve him! he is like a 104 i think correct me if im wrong and there was tunnels dug near his bunker or connected to his bunker he could of escaped and lived the rest of his sad life some where..