Chapter 6- Crime Scene Photography with 100- correct answers.

What are the four key elements of crime scene documentation? 1- Notes 2- Photographs/video 3- Sketches 4- Reports Describe how a photograph might create an identification problem. An identification problem occurs when the viewer cannot tell what the item is or why the photo was taken. If there are no supporting photographs to help the viewer see the evidence better, then the photo is out of context and has limited usefulness. Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Road mapping Capturing all pertinent aspects of bloodstain crime scene What is the purpose of crime scene photographs? The purpose of crime scene photography is to accurately depict the scene without introducing distortion or visual bias. Describe how a photograph might create a confusion problem. Multiple photographs of the same area showing the scene in altered conditions can create confusion or become a distraction at trial. For example: if you take one photo that includes a coffee cup and another that does not, which photo is correct? Was the coffee cup part of the scene? Using a photo log can help eliminate some of these issues up. What are the three basic photographs associated with crime scene photography? Overall photographs Evidence-establishing photographs (mid-range) Evidence quality photographs (close-up) What is the purpose of an overall photograph? The purpose of overall photographs is to depict the general condition and layout of the scene. The technician seeks to capture how the scene is oriented, where major visible landmarks are, and the condition of the scene prior to significant alteration. One round of overall photos is usually taken, then a second round depicting number placards. This allows the proof that nothing is hidden under the placards, but then helps the viewer see the significant points more clearly. What is the purpose of an evidence-establishing (also known as mid-range) photograph? The purpose of the evidence-establishing photograph is to frame the item in conjunction with some obvious landmark evident in the overall photographs. Oftentimes the evidence in the scene consists of small items or artifacts, many of which will not even appear as recognizable objects in the overall photographs. Provided with only the overall photographs and a close-up photograph of the item, the viewer has no means of determining where in the scene this item was. What is the purpose of evidence close-up and forensic quality photographs? Steps for taking close-up photos: 1-fill the frame 2-hold camera perpendicular to the place the object is laying on 3-take a photo both with and without the scale 4-close-up photo should be taken of at least both sides of the object The purpose of these photos is to capture the details of the object. For items such as fingerprints and shoe impressions, a RAW photo is also taken. What are the minimum requirements to include in a crime scene photography log? At a minimum, photo logs should identify the subject of the photo and the exposure number. How does the f-stop affect the resulting photograph? The f-stop affects depth of field. The smaller the aperture (high number) the greater the depth of field. The larger the aperture (smaller number) the shorter the depth of field. How can a crime scene technician prevent overexposure or bleaching out of close-up photographs when using fill-flash techniques? If the camera is too near the subject, the flash may bleach out the view. By using fill-flash (lighting the area with a flashlight rather than the flash) one can avoid overexposure.