We now know Anna Kepner's stepbrother sex assaulted the 18-year-old before he killed her. That according to court documents.   He is now charged in federal court with murder and aggravated sexual abuse. The arrest comes months after Anna Kepner dies on a cruise with her family.  The manner of death  ruled a homicide by mechanical asphyxiation.

Anna Kepner, 18, had begun her senior year at Temple Christian School, and was reportedly excited about her future, painting her school parking spot to match her favorite movie, "Clueless. "   Anna plans included joining the military after high school.  

Anna was found dead aboard the Carnival Horizon cruise ship during a recent western Caribbean voyage that ended in Miami. Her body stuffed under a bunk in the room she shared with her stepbrother.    

Joining Nancy Grace today: 

• Danny Rubin -  Criminal Defense Lawyer and Founder of Rubin Law, PC. website: rubinlawpc.com
• Dr. Geri-Lynn Utter  - Clinical Psychologist specializing in psychological evaluations and risk assessments for individuals involved in the criminal justice system, Author of “Mainlining Philly: Survival, Hope and Resisting Drug Addition,” and “Aftershock: How Past Event Shake Up Your Life Today”, and Producer of “Utter Nonsense,” a documentary of exploration of addition and severe mental illness, available to stream on Apple TV and Prime Video, website:drgerilynnutter.com, Instagram & Facebook: DrGeriLynnUtter 
• Joseph Scott Morgan - Professor of Forensics: Jacksonville State University, Author, "Blood Beneath My Feet", Host: "Body Bags with Joseph Scott Morgan", Instagram @JoScottForensic
• Sydney Sumner  -  Investigative Reporter, ‘Crime Stories’