Lechero is the nickname of Norman St. John, the most powerful inmate at Sona Prison in Panama. His nickname means the Milkman, which is the disguise he used to exact revenge on a man who raped his mother. Lechero presents an obstacle for Michael Scofield in his efforts to break James Whistler out of Sona because Lechero has the only means of communicating with the outside, a cell phone.T-Bag quickly assesses Lechero's power and attempts to ingratiate himself with the kingpin.