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Federal authorities are investigating the death of 18-year-old Florida high school student Anna Kepner, who was found deceased aboard the Carnival Horizon cruise ship in November 7, 2025. The complexity of the case, which occurred in international waters, is compounded by the fact that her 16-year-old stepbrother has been named as a subject in the investigation.

Story Highlights

Anna Kepner, 18, was found dead on a cruise ship on November 7, 2025.
Her 16-year-old stepbrother is a suspect in the investigation.
The FBI is involved due to the death occurring in international waters.
Allegations of family abuse complicate the investigation.

Tragic Death in International Waters

Anna Kepner, an 18-year-old high school senior from Titusville, Florida, was discovered dead aboard the Carnival Horizon cruise ship on November 7, 2025. The incident occurred while the cruise was sailing in the Caribbean, complicating jurisdictional issues due to the death occurring in international waters. The FBI has taken over the investigation, treating the death as suspicious due to the circumstances under which her body was found.

NEW: The 16-year-old stepbrother of Anna Kepner, who was found stuffed under a bed on a Carnival cruise ship, is a suspect in her death, according to the Daily Mail.

The body of Kepner, 18, was found wrapped in a blanket and stuffed under a bed in her cabin on Nov 7.

The ship… pic.twitter.com/zqPO2wHRXW

— Collin Rugg (@CollinRugg) November 19, 2025

Stepbrother Named as Suspect

Court documents have identified Kepner’s 16-year-old stepbrother as a potential suspect in her death. The family had embarked on the cruise together, including Anna’s stepmother and father. Allegations of abuse by Anna’s stepfather against the stepbrother have surfaced, adding a layer of complexity to the investigation. The family dynamic, with its history of alleged abuse, is under scrutiny as authorities seek to determine the events leading to Anna’s death.

Investigative Challenges and Jurisdictional Issues

Investigating a crime aboard a cruise ship presents unique challenges. The FBI’s involvement is crucial due to the incident’s location on a U.S.-based vessel in international waters. Legal authorities emphasize the complexity of such cases, which require coordination between local, national, and international authorities. In this case, the FBI is reviewing security footage and access logs from the ship to piece together the timeline and circumstances surrounding Anna’s death.

Watch the report: FBI Investigates Anna Kepner’s Cruise Ship Death; Stepsibling Examined