JTF-GTMO primarily uses three types of indicators to assess a detainee: 1) the detainee himself provides acknowledgement of a fact; 2) another detainee, document, government, etc. provides an identification of the detainee; and 3) analysis of the detainee’s timeline, activities, and associates in context with other known events and individuals. A fourth method may be available for a few select detainees in their SCI addendum, where special intelligence provides more specific information about a detainee.