16-Year-Old Charged as Adult in Death of Stepsister on Carnival Cruise Ship
The U.S. Department of Justice announced charges against a 16-year-old boy for the murder and aggravated sexual abuse of his 18-year-old stepsister Anna Kepner during a family cruise. Kepner died from mechanical asphyxiation in November while the Carnival Cruise ship Horizon was in international waters heading to Miami. The boy was indicted by a federal grand jury after initial juvenile charges.
Abc NewsCharges Announced Against Stepbrother The Department of Justice announced on Monday that a 16-year-old boy has been charged with murder and aggravated sexual abuse in the death of his stepsister Anna Kepner during a family cruise vacation.
A federal grand jury has indicted the 16-year-old boy as an adult—despite his initial juvenile charging—for first-degree murder and aggravated sexual abuse. According to ABC News and prosecutors, the stepbrother is accused of sexually assaulting and intentionally killing Anna Kepner; the boy has pleaded not guilty.
Anna Kepner, aged 18, died on the Carnival Cruise ship Horizon in November while the ship was in international waters heading to Miami.
Officials stated that Anna Kepner died from mechanical asphyxiation. The boy was initially charged as a juvenile.
Background on Anna Kepner Anna Kepner was a Florida high school senior set to graduate from high school in May.
Kepner’s family said she was interested in joining the military. ' The incident occurred during a family cruise vacation. Prosecutors noted the events took place in international waters. The charges stem from actions by the stepbrother against Anna Kepner on the ship.
Story Timeline
4 events- Monday (2026-04-13)
Department of Justice announced charges against 16-year-old boy for murder and aggravated sexual abuse
1 sourceDepartment of Justice - November 2025
Anna Kepner died on Carnival Cruise ship Horizon in international waters heading to Miami
1 sourceprosecutors - Post-incident November 2025
Boy initially charged as a juvenile
1 sourceprosecutors - Prior to 2026
Kepner’s family issued statement describing Anna Kepner’s personality
1 sourceKepner’s family
Potential Impact
- 01
Family experiences ongoing grief, as highlighted by their prior statement on Anna Kepner
- 02
Federal case proceeds in adult court, potentially leading to longer sentence for the accused
- 03
Cruise line faces scrutiny over incident in international waters during family vacation
- 04
Public awareness increases on youth violence in travel settings
Transparency Panel
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