Abstract: A system and method for monitoring a person within a defined area by detecting breathing, or the lack thereof. Breathing is detected using radar signals, camera signals and/or microphone signals. The radar signals, camera signals and/or microphone signals are analyzed to determine if the subject person is moving, and if not moving if the person is breathing or not-breathing. An alarm is generated should the reflected radar signals, the camera signals and the microphone signals all simultaneously indicate no movement and no movement of the subject person in the defined area for a selected period of time.