An 18-year-old from Titusville, Florida was found dead wrapped in a blanket beneath a bed aboard the Carnival Horizon cruise ship on Nov. 7, and federal authorities are investigating her stepbrother in connection with her death, according ABC News .

Anna Kepner’s death remains under investigation, with the Miami-Dade medical examiner yet to determine an official cause. The office did confirm to NBC News that the time of death was determined to be at 11:17 a.m.

Authorities are examining multiple scenarios, including a possible altercation between Kepner and her stepbrother, as well as a medical emergency or overdose, the source told ABC.

Federal investigators are examining the ship’s security footage, key card access records, and other evidence as part of their probe.

According to A

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