Unit 23 - Forensic Evidence, Collection and Analysis
Institution
PEARSON (PEARSON)
The whole collection of my Unit 23 assignments may be found here. All of these received a distinction, meaning that I received a distinction overall for Unit 23. Assignment A has 10 pages and 3708 words Assignment B has 5 pages and 2454 words Assignment C &B has 13 pages and 3816 words
Unit 23 - Forensic Evidence, Collection and Analysis
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Unit 23 B __ Collecting evidence
Introduction
In this assignment we will include ways of collection of biological, chemical, and physical evidence. We will
prepare proper documentation to record the scene of crime, as well as collect, package and label evidence,
ensuring it remains uncontaminated and that there is a continuity of evidence and that can be sent for
analysis.
CRIME SCENE INVESTIGATION REPORT
FORM 304996-C CRIME SCENE LOCATION REPORT
Nature of crime / victim category: murder/suicide
Location: Eat restaurant
Date and Time of Assessment: 4.5.2022, 10:00am
Description of Location: Eat restaurant that located in the main road that called New Walkergate at the
left side facing North opposite the bus station in London with a shared drive with other shops around it and
the main entrance door facing Southwest. This was not a residential area, but a commercial business area
because it is located closely to a traffic light in a main road. The site is surrounded with a with other
commercial businesses and a car park as well and it is only accessible with a key.
The site is only one building and it has a main entrance door from the front and a door in the back. The
ground floor has a courtyard at the left-hand side when entering the restaurant which is a triangle shape
that facing Northwest and it can be assessed through one door, and the selling side is on the right-hand
side that facing East. There is only one stair that leads to the first floor, and it includes 3 rooms, the
incident took place in the middle room of the restaurant
Description of Crime Scene (including measurements): The victim was found in the rear courtyard of
the restaurant 2 am in the morning, the victim was found by the manager who called the emergency
services on discovery, the paramedic services also pronounced the victim as deceased on arrival and the
manager remain the only witness to the victim. The CCTV from the main restaurant is available, but there is
no CCTV footage is available from the courtyard. The victim was recorded entering the restaurant for a
21:30 reservation.
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, Unit 23 B __ Collecting evidence
The victim was found lying face down in the courtyard and the manager was asked to check the victim by
emergency services while waiting for the paramedics, the manager reported the victim unresponsive and
there are no obvious signs of criminal damage to any other part of the property. The crime scene took
place in two places: the courtyard and the middle room upstairs. The measurements of the middle room
were:
The width of the room is 5.07 meters, the length of the room is 4.90 meters.
The length of the table was 1.62 meters, and the width is 0.5 meters.
Risk assessment:
The scene will have been made safe to enter it and to avoid contamination a PPE (personal protective
equipment) needs to be worn all the time such as goggles, gloves, disposal suit and a face covering, and
this is to prevent the scene and to secure the SOCO (scene of crime officer) from hazards.
When gathering evidence for forensic analysis, contamination prevention, security, and creating complete
records at the scene are all critical. If these tasks are not conducted correctly and wisely, the integrity of
the CSI’s work will be at risk of damage, not just in the case in question, but in all other cases they have
worked on and will work in. When there is a prosecution, it must have confidence that the evidence
collected is the same as the evidence presented in court and that they all are reliable and accurate to use.
They must ensure that contamination did not occur anyway at the scene, as this makes the evidence
invalid and stops the prosecution from building a convincing case. If evidence is proved to have been
contaminated it is considered inadmissible in court and is therefore not able to be used as evidence during
the case, and this could lead to inability to prosecute a suspect.
Collection of evidence:
Fingerprints __Firstly, the fingerprints are subjective data because the opinions of the analysis
can vary between each scientist and investigators, the crime scene needs be photographed to
get a general idea about the place and close focus image about the fingerprints after brushing
it with a magnetic powder. The fingerprints at the crime scene are latent and for it to be
collected correctly it needs to be enhanced. Fingerprints can be powdered using aluminium,
black powder, or magnetic powder depending on the background material to enhance them
and make them visible at the crime scene without damage them, but at the crime scene we
are conducting we used a magnetic powder, and this was done by getting some magnetic powered from
the bottle and then gently brush the required area until the evidence appear with the fingerprint details.
Once the powder is enhanced to the latent fingerprint, an adhesive tape can be used to lift the fingerprint,
this is a fixed clear acetate sheet which is labelled and sent for analysis, and then the place will be
documented and photographed more closer in situ with an evidence marker and smaller version of the
ruler sticker, a ruler may also be used so the size of the object is clear in the photograph. Then the
fingerprint can be put in a protective bag and labelled with the date and time this was taken so it goes to
the analysis. The fingerprints are photographed in high resolution with a forensic measurement scale in the
image for reference. The method is performed safely usually by the law enforcement agencies or crime
laboratories, or it could the evidence sent to private companies. We can improve the quality of the
fingerprint and how to detect them by using a light source such as ultraviolet light before brushing all the
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