The Teacher that Mavis saw was Teacher Belle, who died a year ago. The cause of her death was Raped and Murdered. This what happened to her. As Ma'am Belle was walking home she noticed that a black car was following her. Here Ma'am Belle got scared and run fast. When Ma'am Belle got tired he hid but the man from the Black car found her, after that he raped Ma'am Belle and killed her. That man is the ex boyfriend of Ma'am Belle, he is Jason.
To be continued