Classification of criminal photography

Criminal photography is based on general photography technology and is established to meet the needs of investigation work and physical evidence appraisal work. Taking photos is not limited by time and place conditions. According to the photographed objects, criminal photography can be divided into three types: scene photography, evidence photography and identification photography. One of the important methods to record the results of on-site investigation is divided into on-site orientation photography, on-site panoramic photography, on-site center photography and on-site detail photography. The four types of photos are interconnected and form a complete image of the entire crime scene.

Scene orientation photography to record the relationship between the crime scene and the surrounding environment. When framing the scene, important signs of the surrounding environment should be included, showing the path leading to the site, the terrain around the site, and the buildings to show the location of the site. Mark the exact location of the scene on the photo.

Scene panorama photography records the condition of the crime scene itself, also known as scene overview photography. The framing should reflect the situation within the entire scene, including the status and traces of the violated objects and the distribution of items, to show the nature and main content of the events that occurred on the scene.

Take photos at the center of the site to record the conditions at the center of the site or where the main survey objects are located. The framing should reflect the main survey object and its relationship with adjacent objects and traces to show the significance of this group of traces and objects in the event.

Take detailed photos of the scene, record and fix traces and items with physical evidence significance on the scene, such as prying marks, left behind weapons, footprints, etc. When taking pictures, a scale bar should be placed on the side of the object being photographed. Such photos are often the data and basis for physical evidence examination, and have the same significance as on-site physical evidence photography.

To take on-site photos, if the place or object cannot be reflected in one photo, you can take several photos, or take photos from two opposite directions, that is, the opposite photo method; or from Take photos at the four corners of the scene, that is, cross-photography. If it is a site with long and narrow terrain, you can use the straight-line section photography method to take connected pieces; if it is a courtyard or circular site, you can use the rotation section photography method to take connected pieces. A photograph taken of an arrested criminal or an unidentified corpse for the purpose of later identification. The criminal identification photos should be taken from the front and the right side. The ratio is generally set at one seventh. Hats should be removed when taking pictures, and special chairs should be used to ensure that the criminal's head and torso are in the correct position. When taking photos of an unknown corpse, in addition to taking photos of the front and right sides according to the rules for photographing criminal identification, the left side should also be taken. Not only the appearance of the body when it was found, but also the appearance after plastic surgery.