You're Next

I saw a murder. One of my classmates killed another student. And I made a tragic mistake. I didn't tell anyone right away. I didn't tell my mom. I didn't tell any of my teachers. I didn't even tell the police. I was so scared that I kept it to myself. By the time I got the courage to say something, no one believed me. Only one person believes me. And he's the one who killed her. If I could go back and change anything, it would be that I would have told everyone right away.
Because by keeping quiet, I've given the killer an advantage. I've given him time. Time to come up with ways to hide his crime. Without a body, there is no evidence. And everyone thinks the girl is with her aunt and uncle. Now the killer is coming after me, and he's determined to keep me quiet...forever.