The perpetrators fled the 27-story high-rise jail in Chicago.
Inmates used homemade rope from sheets connected nodes every half meter.
The fugitives have not been able to find.
According to the affidavit, the staff of the correctional institution, on Monday, 17 December 2012 at the evening roll-call 37-year-old Joseph Banks and 38-year-old Kenneth Conley were in place.
But in the morning in the chamber were found only their belongings, rolled under the covers so as to create a sense of presence. Chamber from which escaped prisoners, located at an altitude of about 60 meters, and the window size is 1, 8 meters by 15 cm.