"Professor Dumbledore, please believe me!" Harry was desperate to explain, but Professor Dumbledore gently raised a hand, cutting off his rapid-fire account.
"Now it is your turn to listen to me. Time is short, so please do not interrupt." Professor Dumbledore's voice was low and grave. "Compelling though your testimony is, apart from the news that Pettigrew is alive, we lack conclusive evidence to clear Black's name completely. Back then, witnesses along the entire street insisted that they had seen Sirius kill all the Muggles there. I myself also testified to the Ministry of Magic that Sirius was the Potters' Secret Keeper."
"But we can prove it!" Harry interrupted, unable to contain his anxiety. "Professor Lupin can testify for us too!"
"Harry, Professor Lupin is currently deep in the Forbidden Forest, in a state that leaves him unable to speak," Professor Dumbledore explained patiently. "Even if he returns to human form, we may be too late, and Sirius will be in grave danger. Moreover, many people do not consider werewolves entirely trustworthy witnesses, so their testimony carries little weight. Lupin's close friendship with Sirius would also cast doubt on his testimony."
"Please listen, Harry. You have very little time left." Professor Dumbledore turned his gaze to Jerry and gently patted his shoulder. "A Time-Turner cannot change established events in the past. Jerry, I think you understand that now!"
"Wait, it can't change anything?" Hermione frowned in confusion. "You want us to use the Time-Turner, don't you? But what do you mean when you say we can't change anything?"
Harry: Uh, what? What are you all talking about?
His head was a jumble, and he had absolutely no idea what was going on.
Professor Dumbledore smiled faintly and looked at Jerry. "Jerry knows what to do."
He lowered his voice, but