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Stepbrother pleads not guilty to murder, sex abuse charges in cruise ship death

Stepbrother pleads not guilty to murder, sex abuse charges in cruise ship death

Summary

A 16-year-old boy has pleaded not guilty to charges of first-degree murder and aggravated sexual abuse in the death of his 18-year-old stepsister, Anna Kepner, during a family cruise on the Carnival Horizon ship. Anna died from mechanical asphyxiation while the ship was traveling to Miami.

Key Facts

  • Anna Kepner was an 18-year-old high school senior described by her family as a happy and successful student.
  • The incident occurred on the Carnival Horizon cruise ship in November 2025.
  • The 16-year-old stepson was charged as an adult with first-degree murder and aggravated sexual abuse.
  • Prosecutors say the boy sexually assaulted and intentionally killed Anna.
  • The cause of death was mechanical asphyxiation, which means a physical blockage of breathing.
  • The stepson waived his court appearance at his arraignment in Miami.
  • Anna’s father, Chris Kepner, is married to the suspect’s mother, Shauntel Kepner.
  • The family expressed deep grief and commitment to honoring Anna’s memory.
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