The Tokyo Metropolitan Police Department aims to introduce 3D printers for prosecutors to create more graphic crime scenes in court. The agency will use US-made machines capable of making solid color objects made of plaster using 3D image data captured with portable special cameras. The models will recreate murder scenes, or fire scenes details such as wall colors, shape and furniture layout. The department hopes that such models will assist judges to visualize circumstances such as culprit entry and escape routes as well as crowd member positions at the crime scenes. In current criminal proceedings, prosecutors generally describe crimes using pictures, photos and floor plans; although some of them have had 3D models made manually and used them at trial. The department has already started making prototypes based on the data from several cases. The Metropolitan Police's Criminal Investigation Laboratory introduced 3D printers in 2011 and has since applied them to actual investigations.