Anna Kepner murder: 16-year-old stepbrother charged in killing Florida teen during family cruise

The death of Anna Kepner, an 18-year-old student from Titusville, Florida, during a family cruise in 2025 sparked a federal murder case involving her 16-year-old stepbrother.Kepner was a high school student at the time of his death. She is known to be active in school activities, including cheerleading, and has been making plans for her future after graduation. Family members described her as having a close relationship with her siblings and looking forward to the next phase of her life.She died in November 2025 while traveling with her family on a cruise operated by Carnival Cruise Line. The trip was supposed to be a holiday but turned into a criminal investigation after she was reported missing on the boat.Her body was later found in the cabin she shared with her stepbrother and another sibling. She was hidden under the bed. Medical examination determined the cause of death to be mechanical asphyxia.Because the incident occurred on a cruise ship, the case falls under U.S. federal jurisdiction. Federal authorities, including the FBI, took over the investigation. Early details are limited, but court documents reveal the sequence of events and the charges.Investigators identified her 16-year-old stepbrother as the primary suspect. His name has not been released due to his age. He was later arrested and charged in connection with Kepner’s death.In 2026, a federal grand jury formally indicted him on charges including murder and aggravated sexual abuse. Prosecutors are seeking to try him as an adult. If convicted, he could face life in prison.The case is of concern because of the circumstances of the death, including that it occurred in a domestic setting and on a cruise ship. It also raises questions about how the federal system handles serious crimes involving minors.