And here is where their failures began – the witnesses he called upon remembered either very little or absolutely nothing, and those who did remember something all admitted that the details were murky and that they couldn’t possibly tell exactly who killed who – which was exactly how Hermione felt about that night. Most of the witnesses were professors and their memory loss could be blamed on old age, and the younger ones could’ve suffered a deep emotional trauma and be unable to recall that night for this reason, but Hermione knew the real deal behind all of this was her. Even though Draco didn’t outright admit his crimes, there was no real way for him to deny it, but she still helped him because now no one could tell what really happened.