A 16-year-old boy has been charged with murder and aggravated sexual abuse in Florida in the death of his 18-year-old stepsister on a Carnival Cruise ship, the U.S. Justice Department said Monday.

The death of a Florida teenager on a Carnival cruise ship earlier this month has been ruled a homicide.

The teenage stepbrother of an 18-year-old woman who died on a Carnival cruise ship is a suspect in the FBI investigation, according to court papers filed this week.

The mysterious death of a high school student on a Carnival cruise ship earlier this month is drawing international attention and intense speculation on social media.