What's Wrong?

"There is a secret at the heart of this case, but i don't know exactly what that secret is," says Bret McKenzie. "He feels guilty about killing her even though he's not guilty of killing herself." The entire narrative is from sam's perspective in his call to 911 after finding his fiancee unresponsive on the floor and blood everywhere. He doesn't want to say anything more because he doesn't know what she is right? That may be completely wrong, but it could also be true.