Anna Kepner's grandparents Barbara and Jeffrey were on the Caribbean cruise with her father, stepmother and siblings when she was found dead under a bed

Investigators still have not announced any arrests three weeks after Titusville teen Anna Kepner died aboard a cruise ship. Her family says they are desperate for answers, while passengers recall a chaotic night with little information.

Anna Kepner, an 18-year-old cheerleader from central Florida, was found dead on a Carnival cruise ship earlier this month. Her stepbrother is the sole suspect in the case, and authorities have been tight-lipped about the details since her death.

A father’s subpoena and the release of Anna Kepner’s death certificate deepen questions as the federal probe intensifies.

Anna Kepner's father was subpoenaed in the family court custody case this morning. In addition, a copy of Anna Kepner's death certificate obtained by FOX News reveals Anna's body was cremated after her death on board the Carnival Horizon cruise ship.

On Wednesday, the judge overseeing the custody case denied Shauntel Kepner’s request to seal the records and prevent the parties from sharing information.