im trying to find the name of a mystery book but i dunt kno the name =[ heres a

[Illiza]

discription if what i remember? a girl who's trying to find out the murder in her nieghborhood. someone in her school died and a boy drowned in a lake.she thinks the suspect is her father who suddenly comes see her for a visit meanwhile he was never there for her childhood and her mom died so she lives with her aunt. trhe girl had switched the light on in her room and saw a blood bath then she switched it off then back on and it was just an illusion at the end shes in the forest with the murderer and tries to escape