Man named Abdirahman Sheik Mohamud told federal Judge Michael Watson that he didn't want to leave his family but called his proposal "completely fair and just."
"I truly don't believe I deserve prison at all," Mohamud said in the Dec. 12 letter, filed in the official court record on Thursday.
The local Homeland Security Investigations office said it would seek to strip him of his citizenship and deport him to Somalia as Mohamud, who was born in Somalia and came to the U.S. at 2 years old, may eventually get his wish.
Mohamud planned to fly to Texas and attack the Federal Medical Center Carswell in Fort Worth in an attempt to free Aafia Siddiqui, a Pakistani scientist convicted of shooting at two U.S. soldiers in Afghanistan