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.

Ever since departing the Sunshine State, Carnival Horizon has mainly stayed sailing between 16-17 knots (18-20 miles per hour). Her typical sailing speed would have been closer to 19-20 knots (22-23 mph).

The family of 18-year-old Anna Kepner, who was reported dead while aboard the Carnival Horizon cruise ship on Saturday, speaks out.

Anna Kepner, 18, of Florida, was reportedly found dead under a bed in her stateroom cabin aboard the Carnival Horizon in early November, according to reports.

Criminal charges may be filed against one of Anna Marie Kepner's stepsiblings in connection with her death, according to court records.

Two days after the extremely late arrival, Carnival Cruise Line has apologized to guests and is offering travel change reimbursements.

An investigation into the mysterious death of an 18-year-old woman aboard a Carnival cruise ship that left from South Florida remains open and active.

On Nov. 8, Anna Kepner was found dead on the Carnival Horizon cruise ship while on a trip with her family. Here's everything to know about Anna Kepner, the late teenager who died aboard a Carnival cruise.

New court records and investigative details are shedding further light on the mysterious death of 18-year-old Anna Kepner aboard the Carnival Horizon,<a class="excerpt-read-more" href=" More