"I don't even know how he managed it, to be honest, because where the law was concerned he was just a stranger. He only succeeded because the Dursleys weren't exactly keen on me. Not that they were eager to work with Sirius, either, but he convinced them to let me spend some time with him, if only to take me off their hands every once in a while, and that's how he was able to collect evidence for a case against them." 