A 16-year-old from Florida charged with sexually assaulting and killing stepsister on a cruise ship

A 16-year-old Florida boy, T.H., faces murder and aggravated sexual abuse charges for killing his 18-year-old stepsister, Anna Kepner, on a Carnival Cruise ship. The case is in federal court due to the death occurring in international waters, marking a rare prosecution of a minor in federal court.