Abstract: A system for detecting and mitigating a threat in or around a facility is disclosed. In one embodiment, the system comprises a sensor or receiver configured to detect a biometric marker, such as an iris scan, fingerprint, voice pattern, or facial pattern, and comparing those markers to a database of biometric markers to determine if a match exists. Alternatively, or additionally, the system is configured to detect an anomaly in the background environment of the facility by measuring a variety of variables, such as temperature, pressure, noise-levels, radiation levels, densities, and magnetic fields, and comparing those variables to predetermined threshold values to determine if an anomaly exists. If a match with the biometric marker exists, or if an anomaly in the environmental background exists, the system sends a notification to alert and secure the facility, and contact first responders. A computer-implemented method for securing a facility from a threat using the foregoing system is also described.