Draco rode the lift to the Department of Magical Accidents and Catastrophes and went to the Muggle Liason office. A very unpleasant sort of witch gave him access to the file room where he found the reports on Granger’s parents. The ministry had to keep tabs on every muggle that died by magic and run full reports of their deaths. If Granger’s parents died by magic two days after she disappeared, they could have been a major breaking point in the case.