You drowned but no one knew how you died. When Hermione told Harry that you died Harry said "Yes she drowned. It must've been horrible." Hermione said "Harry it didn't say how she died." The whole Slytherin Gang were your friends and they heard Harry and Theo said "How did you know she drowned when it didn't say how it happened." Harry starts getting nervous as Theo realizes that Harry killed you. Theo charges at Harry. You come in and pull Theo back and glare at Harry.