 In early 2015, after 18 years in solitary confinement, BOP transferred Hammer directly to USP-Tucson, one of the few BOP prisons able to accept Care Level 3 inmates.Within a few months, they hospitalized Hammer for a partial amputation of his right foot for osteomyelitis, a bone infection.The amputation did not cure his condition, and BOP reclassified him to a Care Level 4.