Mobile biometric devices are providing benefits to law enforcement and homeland security field agents who use biometric collection to identify people during field operations in near real time. The use of mobile biometrics to quickly determine the identity of a person can and does save officers’ lives. Of the 584 officers feloniously killed between 2000 and 2009, 82 percent of the persons involved in their deaths had at least one prior criminal arrest or a current warrant out for arrest. If a person is identified through mobile biometrics and is known to have a record, an officer may choose a different tactic, technique, or procedure to preclude a physical altercation. Some mobile biometric devices also allow for full bookings in the field and thereby save time and keep officers where they are needed most: in the field.