"We discovered that the Diary from the second year was one, that was when Dumbledore began to have his doubts... He believes that He-Who-Must-Not-Be-Named or as we now know Tom Marvolo Riddle, was a student at Hogwarts and perhaps the only place he felt at home... Dumbledore believes that if he looked into Riddle’s past he would find the answers to the number of Horcurxes he might have created... He also believes that the night the potters were.... Attacked..."