(CNN) -- William Potts, the "homesick hijacker" who returned from a life on the lam in Cuba to the United States in November, may soon plead guilty to commandeering a passenger plane to the island at gunpoint in 1984, according to U.S. federal court documents. After Potts' arrival and arrest in Miami, Potts' family said they feared he had made an error by handing himself over. "It's taking a toll on my family to think he might go to prison again," Mekoda Potts, his brother, told CNN. "They are trying to put him away for another 20 years? It's not right."
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William Potts, who hijacked a plane and forced it to Cuba in 1984, served time in Cuba
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He returned to the United States last month and seeks a plea deal in federal court
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Potts on his prison time: "15 years in prison in a communist country is 15 years"
Potts said he served more than 13 years in @placeholder jail and then nearly two more years under a conditional release program.