Why did Dumbledore not trust Sirius?

Why did Dumbledore not trust Sirius?

Dumbledore likely thought he had finally given in to his family's beliefs. As for the Death Eaters, they probably thought Sirius was a spy. As for why Pettigrew would go after Sirius, Dumbledore probably saw a Gryffindor who had just lost one of his best friends do something rash out of anger.

Did Dumbledore know Sirius was the Secret Keeper?

I'm saying this because its really starting to annoy me some people actually think Dumbledore knew about Sirius innocence and just let him rot in askaban. Like everyone else, including Lupin, Dumbledore thought Sirius was the secret keeper.

Did Professor Lupin know Sirius was innocent?

No; he believed him guilty. He only realised Sirius was innocent when he saw Petter Pettigrew alive and kicking. The whole Wizardly world believed Sirius had killed Peter, had betrayed the Potters and had killed a dozen Muggles. Lupin was no exception.

How did Lupin find out Sirius was innocent?

He only realised Sirius was innocent when he saw Petter Pettigrew alive and kicking. The whole Wizardly world believed Sirius had killed Peter, had betrayed the Potters and had killed a dozen Muggles. Lupin was no exception.

Did the order know Snape was a spy?

Here Dumbledore made absolutely clear to Sirius, a prominent member of the Order of the Phoenix, that he trusts Snape. "It isn't our business to know," said Lupin unexpectedly. He had turned his back on the fire now and faced Harry across Mr. Weasley.

Why did Dumbledore think Sirius was an innocent man?

• Dumbledore didn't see Sirius as innocent at the time of the incident: (Dumbledore) 'A street full of eye-witnesses swore they saw Sirius murder Pettigrew. I myself gave evidence to the Ministry that Sirius had been the Potters’ Secret Keeper. Sirius didn't act like an innocent man.’ (Hermione) ‘But you believe us.’

Why was Dumbledore never told about the switch?

• Presumably Dumbledore was simply never told about the switch. Indeed, Dumbledore explicitly states in Chapter Twenty-One that he gave evidence that Sirius had been the Secret-Keeper, which he surely would not have done had he known that Sirius had not been the Secret-Keeper:

Why did Dumbledore send Sirius to Azkaban without trial?

• As far as I'm aware, Barty Crouch Sr. sent Sirius to Azkaban without a trial. Personally, the only real and reliable evidence is the evidence that Dumbledore gave and even that could be wrong. Sure, i mean there was a finger left where Peter was but does that necessary mean it was his.

Why did Dumbledore perform the Fidelius Charm on potters?

• Dumbledore performed the Fidelius charm on the Potters, so he knew who the Secret-Keeper was 1. That implies he knew not Sirius but Wormtail betrayed the Potters. Why didn't he prevent Sirius's conviction and suspect the explosion killing twelve Muggles was caused by Wormtail (and that Sirius cornered Wormtail instead of the other way around)?