To report an emergency to a third party in the occurrence of a crime in an urban area, and ensure information related to the crime scene and criminal.

Monitoring cameras 2 and emergency alarm lamps 3 are set on crime-preventing struts arranged at proper intervals or the side wall of a building, and these are mutually connected through wiring or radio. When the operating means 4 of a certain one is ON by a victim, all the systems connected thereto are operated to successively take images of the criminal, and the emergency alarm lamps are also lighted. This photographic information can be used as investigation data.