The family showed no sign they knew a decision about their fate had been made. The four strolled by an outdoor restaurant as security officials kept reporters at a distance. The youngest child was seated in a stroller and the elder boy sat down on a curb.
The U.S. and Cuba share no extradition agreement and the island nation is also not a signatory of the Hague Convention on the Civil Aspects of International Child Abduction, an international treaty for governmental cooperation on such cases.
Cuba has harbored U.S. fugitives in the past, though most of those cases date back to the 1960s and '70s, when the island became a refuge for members of the Black Panthers and other militant groups. More recently, dozens of Cuban Medicare fraud fugitives in the U.S. have tried to escape prosecution by returning to the island.
But Cuba has also cooperated with U.S. authorities in returning several criminal fugitives in recent years, including Leonard B. Auerbach in 2008. Auerbach was wanted in California on federal charges of sexually abusing a Costa Rican girl and possessing child pornography. He was deported.
In 2011, U.S. marshals flew to Cuba and took custody of two U.S. suspects wanted in a New Jersey slaying.
Hakken lost custody of his sons last year after a drug possession arrest in Louisiana and later tried to take the children from a foster home at gunpoint, authorities said. A warrant had been issued for his arrest on two counts of kidnapping; interference with child custody; child neglect; false imprisonment and other charges.
Hakken entered his mother-in-law's Florida house last Wednesday, tied her up and fled with his sons, the sheriff's department has said. Federal, state and local authorities searched by air and sea for a boat Hakken had recently bought. The truck that Hakken, his wife and the boys had been traveling in was found Thursday, abandoned in Madeira Beach, Florida.