In Kiriakou’s most recent letter from prison, written on February 10, he reports a threat allegedly made by a “senior prison official,” who told him months ago that officials have discussed putting him in “diesel therapy” for the rest of his sentence.

“Diesel therapy is when a prisoner is transferred from one prison to another all across the country via prison van, bus or “conair” plane, never staying in any one prison long enough to receive telephone, email, mailing or visitation privileges,” Kiriakou explains. “I could move to a different prison every week for the rest of my sentence and still not hit them all.”