Abstract: Apparatus for photographing objects and/or persons simultaneously with the occurrence of a predetermined event wherein the apparatus is particularly adapted for photographing persons when they shoot traffic signs along highways. The impact of a bullet against the traffic sign energizes an encoded transmitter with transmits a radiofrequency into the air for a first predetermined time period. A receiver/decoder is located remotely from the transmitter for receiving the radiofrequency signal from the transmitter, and a camera is positioned to photograph persons and/or vehicles within a predetermined area adjacent to the traffic sign during the period of time that a signal is received by the receiver/decoder.