A 16-year-old girl is killed and her brother is the first to come upon her murder scene. The teenager's diary leads detectives to her killer...\n\nCheck out our great sponsors!\n\nBambee: Go to Bambee.com/coldcase RIGHT NOW to schedule your FREE HR audit!\n\nNutrafol: Go to Nutrafol.com and use code COLDCASE to get 20% off! - plus FREE shipping on EVERY order!\n\nMadison Reed: Go to Madison-Reed.com and use code CCF to get 10% off plus free shipping on your first color kit!\n\nPluto: Check out all your favorite Cold Case Files episodes on Pluto TV! Drop In. Watch Free.