What happened to the person who discovered irrational numbers?

Little is really ''known'' about this. Stories abound and many conflict. The surest element of the tales is that root 2 was the first number proven irrational. The favourite for "whodunnit" was Hippasus. Many tales are told of his death by drowning. "Whodun'''that"''' has various answers with Pythagoras as the favourite pusher. Other stories have Pythagoras ordering Hippasus drowned for revealing the existence of Irrational Numbers, which Pythagoras thought should be kept secret.