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Identifying Potential Terrorist Behavior Using 911 Calls: A Five-Step Process


To help identify potential terrorist behavior from 911 calls, researchers used a five-step process. In step one, they analyzed and compiled data from 1.3 million original call records into a single searchable database. In the second step, researchers filtered the records based on call type, which reduced the number to 100,000 call records. In step three, these records were filtered again by surveillance-related keywords. This decreased the number of call records to 850. In step four, researchers sorted the records by date, time, location and type of activity to identify incident clusters. In the final step, researchers assessed each call to determine the locations with the greatest potential risk. At the end of the process, 12 locations of interest were identified.