Overview: Any time best friends turn on each other, it's a tragedy--years of love and trust swept away in a moment of anger, jealousy, or greed. But some cases are so shocking that nobody sees them coming. These are the seven least likely suspects from Season One of I Killed My BFF. Narrated in the voice of murder victim Misti Mayo, this special episode traces the stories of seven killers who fooled everyone... until it was too late.