Methods and systems provided. A system may include a mobile surveillance unit positioned within an environment and including one or more sensors configured to detect one or more events occurring within or near the environment. The system may also include an application program configured to: convey data related to a detected event of the one or more events to an electronic device remote from the mobile surveillance unit; and in response to input associated with the detected event, convey, from the mobile surveillance unit, image data, video data, audio data, or any combination thereof, previously captured at the mobile surveillance unit and associated with the detected event.