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Restriction of access:
The use of crime scene tape to secure the crime scene is the most key factor in collecting and
preserving evidence. This is done to preserve the integrity of the relevant evidence until it can be
captured and collected. The condition of the physical evidence at the time it is obtained may have an
impact on whether a case is successfully prosecuted. When the first police officer arrives on the site,
the scene is protected. This protection ends when the scene is released from police possession.
Scene security difficulties can frequently be caused by the introduction of additional personnel.
There should only be those who oversee handling the crime scene, protecting the crime scene, and
conducting the initial investigation of the incident.
Why you do it: The actions of those present at a crime scene are mostly responsible for
contamination. In general, the probability of the scene or the proof being tainted increases with the
number of people present. Hidden footprints or footprints may be destroyed, while hairs, fibers, and
trace material may also be left behind. Because of this, it is crucial to protect the crime scene as soon
as it is discovered.
We do that to prevent any cross contamination of DNA that could alter the investigation
What happens if procedures are not carried out correctly?
There is a high probability that the crime scene site is exposed to contamination and a lot of
evidence will be destroyed and in the end the case will not run its course.
For example: Meredith Kercher
When she was 21 years old, Meredith Kercher, a British exchange student from the University of
Leeds, was killed in Perugia, Italy. She passed away on November 1, 2007. Kercher's body was found
on the floor of her bedroom. By the time Rudy Guede's bloodstained fingerprints were identified at
the site, Amanda Knox, Kercher's American roommate, and Raffaele Sollecito, Knox's Italian lover,
had already been charged by the police. Professor Conti aired a brief video of two police officers
retrieving the bra clasp to show how a few things happened in Meredith's case to show how the bra
clasp was found six weeks after the murder and in a different area. The public gallery
gasped as they watched the two officers take up the clasp, pass it from hand to hand,
drop it, pick it up, and finally set it back down on the ground. Although gloves were
worn, Professor Conti claimed that one of the police officers thumb and fingers had
distinct dirt stains, and he stated We can infer from these conditions proper protocol
was not followed.”
Observation and recording of scene
The first stage in documenting a crime scene is, if one is available, using a video camera. Tape
recording can provide you with a perspective on the organization of the crime scene that pictures
and sketches cannot always do. People can more easily relate to it as a more natural seeing medium,
especially when it comes to showing how the crime scene is laid out and how the evidence relates to
the crime. The video camera should not be turned off until the full tape has been recorded once it
begins to record. A steady camera is necessary for taking high-quality video.
No matter if a video camera is available, it is essential to take still pictures of the crime scene to
document it. Taking pictures of the crime scene will be the next step if a video camera is not
available.
, Images from the crime scene may also be used in direct comparison situations. To compare
fingerprints and footprints collected at the crime scene to known fingerprints or shoes belonging to
a suspect, actual size photographs, sometimes referred to as one-to-one shots, can be used.
Compared to videos, photographs have an advantage.
The last stage in documenting the event is to sketch the crime scene. The drawback of photographs
being two-dimensional representations of three-dimensional objects is this. This means that most
photographs distort the coordinates between the items that were taken, making them appear closer
or farther away than they are. If the physical links between the evidence are important or if any
calculations require proportionate measures to be included, a representation of the crime scene is
necessary (such as bullet trajectory angles, accident reconstructions, etc.). Initial observations can
prompt measures to protect information that might help solve a crime.
Why we do it: A crime scene sketch depicts a location's general layout and how the environment
relates to the evidence. It can show the distances travelled along each route chosen by a suspect or
victim. Additionally, they record the crime scene's evidence. This is carried out to help the crime
scene investigator accurately recall the incidents and identify evidence in a court of law, as well as to
be aware of everything that is positioned in the vicinity of the crime scene and to be aware if
anything disappears from the crime scene.
The image accurately depicts the crime scene, including murders, fights, fires, robberies,
demonstrations, and lewd behavior. Preserve the artefacts at the crime scene before moving them,
such as photographing fingerprints, and preserve the evidence that may deteriorate over time, such
as scratches and bruises.
Crime scene photographs are complete, permanent evidence that can be used in court to argue for
or against the facts at question. The images are possible to provide the same facts and prove the
investigator's statement in a more accurate and understandable way than the verbal description of
the crime scene.
1. The overview, a general shot with features to identify the location
2. The location of any considerable evidence, usually a mid-range shot
3. The evidence detail, with close-up procedures
What happens if procedures are not carried on correctly
If the required video and photos of the crime scene are not taken, this is one of the big problems:
First, because there is no proof that the evidence was found at the location of the crime scene.
After entering the crime scene and starting to move all evidence and moving the item from one
place to another, the basic structure of the crime scene will be dismantled. Therefore, the
investigator will not be able to link the evidence with the events of the crime until after reviewing
the photos and videos repeatedly
Also, if there were no photographic evidence of the crime scene and the evidence. Weak factor in
the court if it did not exist and convincing evidence if it existed
For example? Jessica chapman and holly wells
Two small children were murdered as a result of the Soham Murders, which took place in Soham,
Cambridge shire, England on August 4, 2002. Two girls, Holly Marie Wells and Jessica Aimee
