In either case, the crime scene investigator advises the detective or officer in charge of the crime scene of findings so the agency can proceed with its investigation. Photographing the crime scene to record a pictorial view of what the scene looks like and to record items of possible evidence. Scene Search for Biological Evidence Crime scene investigators may search a crime scene, other locations associated with a crime scene or individuals for suspected biological evidence i. Can this evidence still be processed, even though it may have been irreparably compromised? Upon finding such items of evidence the technician will need to photograph their location and possibly complete a sketch showing the exact location of the evidence or perhaps a sketch of the footwear pattern. Each crime scene is different and may require a different approach to processing the scene.
These aspects make it even more paramount to follow procedures to ensure safety of on-scene personnel and successful prosecution of criminals. Evidence tape is used to seal the packaging and is marked with the investigator's name or initials and the date sealed. This information may not be factual information but it will give the investigator a base from which to start. While the information presented here is from reliable sources, there is no substitute for training or personal experience. Examine the scene for what? Discuss: What steps should be taken to secure the crime scene? This intermingling of the steps in the protocol will continue throughout the processing of the crime scene. Hopefully we have developed a training and certification program that can meet the needs and requirements of all police agencies. How do you explain to someone the mechanics of thoroughly processing a crime scene? For an extreme close-up shot, the item should be photographed at least twice, once with a scale ruler and at least once without a scale.
Crime Scene Processing Protocol Crime Scene Processing Protocol byIllinois State Police In the endeavor of completing a work task certain criteria to complete the work task is needed. The other part of the equation to successful crime scene processing besides knowledge is ability. However, to ensure a thorough process, the seven steps outlined below are often followed. How and Where Tests on the Evidence are Conducted The most probative evidence will be sent to either a forensic laboratory or, if the laboratory does not have an expert in that forensic discipline, to an outside analyst for examination. Examine the scene for what? Sirchie launched a new website on May 22, 2014 providing an updated user experience for our customers.
Process the scene for what? Establishing the Chain of Custody The chain of custody is a tracking document beginning with detailed scene notes that document where the evidence was received from or collected. Document and collect additional items, depending upon the conditions at the scene and stability of the item of evidence. Take photographs of the vehicle from a distance, if necessary, in order to include the landmark. This should illustrate the holes or damage with exact standard measurements, and permit another specialist or analyst to re-create the damage or bullet holes on a scaled diagram. The chain of custody is initially established when an investigator takes custody of evidence at a crime scene, or when evidence is received from an officer or detective at, or from, the crime scene. Additional areas for consultation and evidence storage may also be established if necessary. Look for signs of objects that seem to be out of place or that a suspect would be likely to come into contact with; these items should be fingerprinted later.
Keeping your vehicle in good shape and properly stocked with supplies helps you do your job more accurately and more efficiently. When only a small amount of the stain is available, concentrate as much of the stain as possible on the tip of the swab. Contributing authors of articles and those who maintain pages linked to this site assume total responsibility for the contents and accuracy of their articles and pages. Ask students to rate their confidence level in their hypothesis. Basically what allegedly happened, what crime took place, and how was the crime committed.
This will protect bloodstain patterns and prevent cross-contamination between stains on one item. Also look for small things like hairs and fibers. Package the swab inside an appropriate container. Even talk to people who didn't see anything. These may include large items such as vehicles and countertops, and points of entry, such as window and door frames. Please contact us at 919 554-2244, 800 356-7311, or email us at.
A Luma-Lite or a Poliray® light is an example of an alternate light sources. You'd be surprised how many bosses who demand entry change their minds when they are reminded they will likely be subpoenaed to court later to explain why they were there. Of course interwoven throughout these five steps is the recording of the crime scene by photographs, sketches, and field notes. Mark the item of evidence when possible. In addition, a common entryway is often established that all crime scene personnel will use to enter and exit the scene and all people entering or leaving the scene are documented once the boundaries have been established. How a Crime Scene Investigation is Conducted The circumstances that investigators encounter at the scene will largely dictate the approach used to process the scene. Students should be forewarned that the content of this course contains numerous death scene photographs that are highly graphic and intense.
Wet evidence should not be folded over on itself. Evidence Collection Investigators should perform the evidence collection process in a systematic and careful manner. The goal of the forensic scientist is to preserve and protect evidence at a crime scene. While this list is by no means all inclusive it is a basic list of books that supply sufficient information that will give you the basics in crime scene processing. This entails detailed documentation with digital and video cameras or, if available, a 3-D scanner. Photography of the scene and of evidence is one of the first procedures performed at a scene.
To help identify the evidence that is most valuable, the crime scene personnel may conduct initial screening tests, called presumptive tests, at the scene. So we will attempt here to define what is minimally required in training, ability and equipment. Before utilizing any technique described here, be sure and check your local regulations and procedures. Radiating out from that point, investigators establish an area that is sizeable enough to likely contain all relevant physical evidence that may be present. We have not seen at this point any book that is all inclusive for crime scene processing. The official laboratory report is addressed to this officer.