“Professor Snape’s version of events is far more convincing than yours…. without Pettigrew, alive or dead, we have no chance of overturning Sirius’s sentence.” Albus Dumbledore, PoA, “Hermione’s Secret”
Let’s revisit Albus's insistence at the end of PoA that he could not clear Sirius Black's name.
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Sirius’s status )