A glimpse of the outside world came in the form of mail. All incoming and outgoing correspondence was delivered by the cellblock guard, and each parcel was marked with the prisoner's ID number, although new inmates weren't able to receive packages for their first 90 days. Despite this process, more than a few contained contraband. Since every piece was opened and checked, it took ingenuity to conceal nefarious items: a hollowed-out Bible encasing a gun and shoes lined with shanks or drug needles. In later years, X-ray machines and other devices would identify the presence of firearms and cellphones. The latter was used to orchestrate a 2005 escape attempt that left a correctional officer dead. Prisoners could also use these mailboxes to write grievance letters to The Warden on everything from prison food to the state of working and living conditions.