Yes, once he discovered Voldemort was going to kill the only woman he ever loved, Lily Evans, he went to Dumbledore and in return for their protection joined the Order of the Phoenix.
Snape told Voldemort he was a Death Eater spying on the Order. In reality, he was an Order member spying on the Death Eaters and only telling Voldemort selective information.
Albus Percival Wulfric Brain Dumbledore and Severus Snape.
Severus Snape used a killing curse on Albus Dumbledore.
No, Severus Snape did.
severus snape killed albus dumbledore
cause dumbledor wanted snape to kill him
Very much.
In the end, he's loyal to Dumbledore.
No, he was told to kill Dumbledore by Dumbledore
Albus Dumbledore was hit by the killing curse, Avada Kedavra, which was cast by Severus Snape.
Albus Dumbledore was killed with a killing curse by Severus Snape.
They had it planned together I think and that's why dumbledore was pleading with snape. But that doesn't answer your question x
No, Severus Snape is the Half-Blood Prince.