If You Were Here by Alafair Burke
Lawyer/journalist McKenna Jordan is trying to solve a 10 year old missing person case. The person missing is her good friend Susan Hauptmann. Susan appears in a video here she saves a boy from falling on train tracks. McKenna, while tying to find her long lost friend comes upon many more mysteries involving murder. Now the police and FBI are talking to her.
A pretty good read. I would recommend it. -- submitted by Marianne