Photography
All crime teams take photographs of the crime scene before anything is moved back to the lab so that they have original placement and a way to reconstruct the crime scene in the lab if need be. Photographs are also taken of the body once in autopsy so that any top skin damage is marked before the body is cut into or any of the evidence like dirt is washed away when they clean the body. The first rule while taking crime scene photos in to not disturb any part of the crime scene, take the picture before the evidence is moved in any way. Keep in mind that any picture taken at the crime scene by a police officer or a crime lab worker can end up in court. While taking the pictures, a complete series of pictures needs to be taken; an overview of everything, a midrange shot of the thing and its immediate surroundings, and finally just a close up that only shows the important details clearly. During the shots, take time to pay attention to how the camera is positioned and what the camera angles are. The fourth rule out in the field during the picture process is to record all the data. Those are the main things that the police need to stay on top of while collecting the data, without crime scene photos, there is no crime.
Crime Scene Photography. 7 Aug 1997. 5 May 2009 http://www.rcmp-learning.org/docs/ecdd1004.htm