Once Draco was home, he studied the materials. Granger’s badge, handwritten note, and the file were all connecting pieces. Draco just had to see how. The file explained that her parents weren't victims of Avada, nor were there traces of poison. It read too similar to the other deaths he’d been studying. Crabbe, Goyle, Carrow. All former Deather Eaters had been executed with an unknown spell or potion that wasn’t traceable by Ministry magic. So why were Granger’s parents in that same group? They weren’t associated with Death Eaters. And they certainly weren’t a threat to the magical community as muggle dentists. Though Draco did make the fascinating discovery that these dentists were actually just muggle healers of teeth. Imagine!