copycat crime
criminal act that is modelled or inspired by a previous crime that has been reported in the media or described in fiction
en-US/ˈkɑpiˌkæt ˈkɹaɪm/
en-GB/ˈkɒpɪkæt ˈkɹaɪm/
criminal act that is modelled or inspired by a previous crime that has been reported in the media or described in fiction