Severus Snape fez um Comensal da Morte antes ou depois de contar a Voldemort sobre a Profecia?

‘Professor Snape made a terrible mistake. He was still in Lord Voldemort’s employ on the night he heard the first half of Professor Trelawney’s prophecy. Naturally, he hastened to tell his master what he had heard, for it concerned his master most deeply.’

_{Albus Dumbledore - Half-Blood Prince - page 512 - Bloomsbury - chapter 25, The Seer Overheard}

Que Dumbledore diz " ainda no emprego de Lord Voldemort" sugere-me que Snape estava chegando ao fim de seus dias como Comensal da Morte porque era a interpretação de Voldemort da profecia - e a recusa final de Voldemort para poupar a vida de Lily - isso fez com que Snape se voltasse contra Voldemort e se tornasse um agente duplo de Dumbledore. Eu acho que o tempo desses eventos verifica que Snape era de fato um Comensal da Morte na época em que ele ouviu a profecia.

Severus Snape já era um Comensal da Morte.

Ele se aproximou de Dumbledore depois de já ter contado a Voldemort sobre a profecia.

“What request could a Death Eater make of me?”

“The — the prophecy . . . the prediction . . . Trelawney . . .”

“Ah, yes,” said Dumbledore. “How much did you relay to Lord Voldemort?”

“Everything — everything I heard!” said Snape. “That is why — it is for that reason — he thinks it means Lily Evans!”

“The prophecy did not refer to a woman,” said Dumbledore. “It spoke of a boy born at the end of July —”

“You know what I mean! He thinks it means her son, he is going to hunt her down — kill them all —”

“If she means so much to you,” said Dumbledore, “surely Lord Voldemort will spare her? Could you not ask for mercy for the mother, in exchange for the son?”

“I have — I have asked him —”

“You disgust me,” said Dumbledore, and Harry had never heard so much contempt in his voice. Snape seemed to shrink a little. “You do not care, then, about the deaths of her husband and child? They can die, as long as you have what you want?”

“Hide them all, then,” he croaked. “Keep her — them — safe. Please.”

“And what will you give me in return, Severus?”

“In — in return?” Snape gaped at Dumbledore, and Harry expected him to protest, but after a long moment he said, “Anything.”

Aqui vemos o começo de Snape como um agente duplo.

De início, vemos Lily dizer

You and your precious little Death Eater friends — you see, you don’t even deny it! You don’t even deny that’s what you’re all aiming to be! You can’t wait to join You-Know-Who, can you?