Intelligence/Investigations (I/I) is a sixth ICS function identified in NIMS. The Intelligence / Investigations function can be established to collect, analyze, and disseminate incident-related information and intelligence for incidents involving intensive intelligence gathering and investigative activity (such as a criminal or terrorist act, or epidemiological, accident or mass fatality investigation).

When I/I is required, the Incident Command/Unified Command can place the I/I function in multiple locations within the incident command structure based on factors such as the nature of the incident, the level of I/I activity, and the relationship of I/I to other incident activities.