Abstract: A video processing system (VPS) receives video data from at least one video camera included with an emergency vehicle. The VPS also receives audio data from at least one microphone operating in conjunction with the video camera(s). The VPS determines whether received data representing a first set of video frames includes a predefined image pattern. If so, the VPS tracks the image pattern within the video data and determines whether data representing a second set of later-in-time video frames includes the tracked image pattern. If the second set of video frames includes the tracked image pattern, the VPS determines whether the tracked image pattern has changed position suspiciously. If so, the VPS communicates an alert. The VPS also determines whether received audio data includes a predefined audio pattern. If so, the VPS inserts a digital marker within the video data at the time at which the audio pattern commenced.