However, Pettigrew was able to frame Sirius for his betrayal of the Potters, the murder of twelve Muggles, and the staged murder of Pettigrew before Sirius could accomplish this. Sirius was sent to Azkaban and, after twelve years, became the only known person to escape the prison unassisted.
Peter faked his own death to escape and framed his supposed friend. Before transforming into a rat, Pettigrew cut off his finger, screamed that Sirius had betrayed Lily and James and blew apart the street – killing everyone in a twenty-foot radius. He then sped off down into the sewers to hide.
Soon after the death of James and Lily Potter, Sirius was framed by his old friend Peter Pettigrew for their betrayal and the murder of twelve Muggles during Peter's attempt to escape Ministry law enforcement.
Sirius was arrested, accused of murdering Pettigrew and the muggles and of serving Voldemort, and was promptly thrown in prison by Barty Crouch, Sr. without receiving a trial. He spent the next twelve years in Azkaban, brooding over his friends' deaths and obsessing over Pettigrew's betrayal.
Over fifty Muggle witnesses reported what Pettigrew said to Ministry of Magic officials. As this left a large amount of incriminating evidence against Sirius Black, he was arrested and, without a trial, sent to Azkaban for the next twelve years.
Why Dumbledore WANTED Sirius to ROT in Azkaban - Harry Potter Theory
Who framed Sirius Black?
Sirius Black
He was then subsequentally burnt out of the family tapestry for daring to be different. Next up: he was imprisoned in Azkaban for over a decade for the murder of 12 Muggles and his former best friend Peter Pettigrew, who actually framed him and faked his own death.
After Lord Voldemort returned in 1995, Sirius rejoined the Order. He was killed by his cousin Bellatrix Lestrange during the Battle of the Department of Mysteries and subsequently cleared of all charges by the Ministry of Magic, though it was too late for him to enjoy his freedom.
Until the climax of Prisoner of Azkaban, Lupin believed Sirius Black was guilty of murdering 12 Muggles, betraying Lily and James Potter, and killing Peter Pettigrew. He eventually discovered the truth — that Sirius was innocent, and the very much alive Peter was the traitor.
He was framed. Most of everyone in the wizarding world believed that he had murdered people. Peter Pettigrew had become the secret keeper for James and Lily when they had found out Voldemort was looking for them.
Peter Pettigrew, one of James and Sirius's best friends, was the real traitor. The Potters, Sirius, and Peter were the only ones who knew that they had switched the Potters' secret keeper from Sirius to Peter at the last moment.
Dumbledore's lack of belief that Sirius is innocent is also suspect. Sirius was a member of the Order of the Phoenix which fought against Death Eaters, but Sirius also was as close to James as a brother, the Potters even took him in when he ran away from home.
Peter Pettigrew's betrayal of the Potters and allegiance to Voldemort was a result of his unhealthy admiration for James and desire for power. Sirius Black was believed to be the Potters' Secret Keeper, but he secretly switched with Peter Pettigrew, who turned out to be a mole.
Peter Pettigrew, Order of Merlin - First Class (possibly retracted), (c. 1960 - March 1998), also known as Wormtail because his animagus is a rat and a rat's tail looks like a worm., was a wizard and son of Mr. and Mrs.
At the end of GOF only a handful of people even know that Sirius is an animagus, let alone his loveable big doggie form. But by the beginning of OOTP we have Lucius Malfoy able to "recognize" Sirius by seeing the large black dog with Harry.
Why did the twins never see Peter Pettigrew on the map?
Others believe that the twins never even noticed him, as they mentioned to Harry that they didn't need the map anymore as they already knew the castle by heart, so by the time Ron arrived, they didn't use the map anymore and thus never saw him sleeping with Peter Pettigrew.
Sirius treated him like this because he hated his family and their house. Kreacher resented Sirius because of this treatment, and he later betrayed Sirius by telling Bellatrix about how she could exploit his close relationship with Harry, eventually resulting in Sirius' death.
Sirius also disliked Regulus because of his ambition to become a Death Eater, but he was unaware that Regulus later attempted to destroy one of Voldemort's Horcruxes. Sirius regretted how young his brother died and wished Regulus hadn't been as soft to go with what their parents told him to do.
Regulus never told Kreacher that he had turned away from Voldemort since he knew it would be safer for his family if they continued with the pure-blood ideology. So, Mrs. Black and Sirius never learned the truth—and Kreacher dutifully kept his secret until Harry Potter showed kindness and offered help.
And Remus was in love with Sirius (also hopelessly, because Sirius only had eyes for James). Then James was killed, Sirius was imprisoned, Remus was outcasted, and Peter was ratatouilled.
Draco, who implies that he is aware of how Sirius Black was supposedly involved in the deaths of Harry's parents, also taunts Harry about the impending threat of Black: "If it was me, I'd want revenge. I'd hunt him down myself."
Goblet of Fire Cedric Diggory: Book: "Wands out, d'you reckon?" Movie: "Who are you, what do you want?" Order of the Phoenix Sirius Black: Book: "Come on, you can do better than that!" Movie: "Nice one, James!"
Upon the dais is a stone archway, covered with a tattered black veil. Sirius is hit by Bellatrix's curse, and his stunned body arcs into the air and floats through the archway, disappearing behind the veil. Harry expects Sirius to reappear on the other side, but he never does.
Following Voldemort's fall, Snape made no attempt to find his master, for he, like other Death Eaters, believed that Voldemort was dead, and he could use Dumbledore's protection to avoid being sent to Azkaban.
