Stepbrother, 16, named a suspect after teen found dead on cruise ship

18-year-old Anna Kepner, 18-year-old Anna Kepner, is seen in this undated photo from the family. (CNN)

BREVARD COUNTY, Florida (WESH) -- The 16-year-old stepbrother has been named a suspect in the death of 18-year-old Anna Kepner, court documents show.

Kepner, from Brevard County, was found dead on a Carnival cruise.

She was a student and cheerleader at Temple Christian School in Titusville. The FBI has been investigating her death without disclosing any findings or the cause of death.

The new information comes from a court document filed in the divorce case of Kepner’s stepmother, who was on the cruise with her.

The document states, “An extremely sensitive and severe circumstance has arisen wherein the Respondent/Mother will not be able to testify at the hearing at this time.”

It further notes that Kepner was on the cruise with her stepmother and her minor children, adding, “She has been advised through discussions with FBI investigators and her attorneys that a criminal case may be initiated against one of the minor children of this instant action.”

The document indicates that the stepmother cannot testify as it could be prejudicial for her child in the criminal case.

However, it does not explain why the child could face charges or provide details about what happened.

The stepbrother has been released from custody, documents show. It’s not clear if he was arrested.

By Bob Hazen, WESH