Stepbrother Charged With Murder of Teen on Carnival Cruise

The 16-year-old suspect was initially charged as a juvenile before the case was transferred to adult prosecution.

Apr. 13, 2026 at 4:54pm

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An extreme close-up photograph of a single handcuff, lit by a harsh, direct camera flash against a pitch-black background, creating a stark, gritty, investigative aesthetic.The harsh flash photography of a lone handcuff evokes the grim realities of a tragic crime aboard a cruise ship.Titusville Today

Federal prosecutors have indicted a 16-year-old Florida boy as an adult on charges of first-degree murder and aggravated sexual abuse in the killing of his 18-year-old stepsister aboard a Carnival cruise ship last November. The incident occurred while the ship was in international waters en route to Miami, and the Miami-Dade Medical Examiner determined the cause of death as mechanical asphyxiation.

Why it matters

Crimes committed on cruise ships in international waters often present complex jurisdictional challenges for law enforcement, and this case highlights the seriousness of the allegations and the decision to prosecute the minor suspect as an adult.

The details

According to the newly unsealed federal indictment, the 16-year-old suspect, identified as T.H. from Titusville, Florida, was traveling with his 18-year-old stepsister Anna Kepner and other family members on the Carnival Horizon cruise ship in November 2025 when the alleged assault and killing occurred. Investigators say T.H. sexually assaulted Kepner and intentionally killed her, though the specific details of the incident are not yet publicly known.

  • The incident occurred in November 2025 while the Carnival Horizon cruise ship was in international waters en route to Miami.
  • T.H. was initially charged as a juvenile on February 2, 2026, and the case remained sealed for months.
  • In a later court ruling, U.S. District Judge Beth Bloom ordered the matter transferred for adult prosecution, prompting the grand jury indictment.

The players

T.H.

A 16-year-old Florida resident who has been indicted as an adult on charges of first-degree murder and aggravated sexual abuse in the killing of his 18-year-old stepsister aboard a Carnival cruise ship.

Anna Kepner

The 18-year-old stepsister of T.H. who was killed aboard the Carnival cruise ship in November 2025.

U.S. District Judge Beth Bloom

The judge who ordered the case against T.H. to be transferred from juvenile to adult prosecution.

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What’s next

The judge in the case will decide on the sentencing for T.H. if he is convicted on the charges of first-degree murder and aggravated sexual abuse.

The takeaway

This tragic incident aboard a Carnival cruise ship highlights the complex legal challenges that can arise when crimes are committed in international waters, as well as the difficult decisions around prosecuting minors as adults in severe cases.