Abstract: Most embodiments of the invention are for a public safety device that is typically worn and may collect various types of information from stimuli, whether from the environment or, if worn, then also from the body wearing the device. The device is typically in constant communication with at least one remote server. In certain embodiments, the device may communicate instrument data to be processed by a remote computing device to detect a combative situation and relay an emergency signal. In other embodiments, based on certain input from the various instruments measuring the stimuli, the device itself may detect a combative situation and transmit an emergency signal.