TITUSVILLE, Fla. – The teenage stepbrother of Anna Kepner “is a suspect” in the 18-year-old’s death on a cruise ship, according to new court documents filed by both of the stepbrother’s parents as part of a child custody case.

Anna Kepner died on the Carnival Horizon on Nov. 7 while the cruise ship was at sea, according to the Miami-Dade County medical examiner.

The 18-year-old’s body was found by a housekeeper under the bed in her stateroom the day before the ship docked in Miami, law enforcement sources told CBS News.

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The FBI, which is investigating the Titusville teen’s death, has not disclosed details about its probe.

Anna Kepner was joined on the cruise by her father Christopher Kepner, her stepmother Shauntel Kepner, and at least two of Shaunt

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