BTEC HND Level 5 Unit 34 Forensic Evidence Collection and Preservation Assignment Sample UK

Course: Pearson BTEC Levels 4 and 5 Higher Nationals in Applied Sciences

BTEC HND Level 5 Unit 34 Forensic Evidence Collection and Preservation is designed to equip learners with the knowledge, understanding, and skills required to undertake forensic evidence collection and preservation. The unit focuses on the need for effective crime scene management in order to protect the evidential value of any items recovered and covers the main methods of lifting fingerprints, collecting DNA samples, managing bloodstain patterns, and casting footwear impressions.

The unit content introduces the structure and function of the body, bloodstain patterns, and how they are formed (including different types of spatter), as well as general consideration for evidence collection. You will also be given an overview of DNA and how it can be used as evidence, along with specific information on collecting and preserving DNA samples. The unit culminates in a focus on footwear impressions, including the different types that can be found at crime scenes and the methods used to cast them.

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We are discussing some assignment briefs in this unit. These are:

Assignment Brief 1: Explore the measures employed to ensure the integrity and preservation of evidence collected from a crime scene.

The integrity and preservation of evidence collected from a crime scene is of vital importance, as it can play a key role in helping to identify and prosecute perpetrators. There are a number of measures that are employed to ensure the integrity and preservation of crime scene evidence, including careful documentation of the crime scene, controlling access to the area, and utilizing appropriate storage methods.

One of the most important measures for preserving evidence integrity is documentation. All aspects of the crime scene must be carefully documented, in order to provide a clear and accurate record of what was present. This documentation can take many forms, including photographs, video recordings, and written reports. It is important that all details are accurately captured, including the location of evidence and any objects that may have been moved or disturbed during the investigation.

Another important measure for preserving crime scene evidence is controlling access to the area. In order to ensure that there is no interference or contamination of evidence, it is critical to limit access to the crime scene as much as possible. This can be done by cordoning off the area and restricting entry to authorized personnel only.

In addition to these measures, evidence collected from a crime scene must also be stored appropriately. This can involve using specialized containers or bags that are designed to protect against damage and degradation, as well as ensuring that they are kept at appropriate temperatures and humidity levels. Finally, any evidence that is collected must also be carefully transported to a forensic laboratory for analysis, in order to minimize the risk of accidental contamination or loss.

Overall, there are many measures that are employed to ensure the integrity and preservation of evidence collected from a crime scene. These include careful documentation and control of access, as well as secure storage and transportation methods. By following these measures, investigators can help to ensure that the evidence collected from a crime scene is protected and preserved, ultimately increasing the chances of successful prosecution.

Assignment Brief 2: Investigate methods of collection of biological evidence.

Biological evidence can be defined as any material that contains DNA, such as hair, skin cells, blood, or saliva. This type of evidence can be extremely important in criminal investigations, as it can help to identify suspects and link them to specific crimes. There are a number of different methods that can be used to collect biological evidence, depending on the type of material that is present.

One common method of collecting biological evidence is swabbing. This involves using a cotton swab or other absorbent material to collect DNA from a surface, such as skin, hair, or blood. Swabs can also be used to collect DNA from objects that may have been handled by a suspect, such as a doorknob or piece of clothing.

Another common method of collecting biological evidence is plucking. This involves removing individual hairs from a suspect, which can then be used to obtain DNA samples. Hairs can also be collected from crime scenes, although they are often not as useful for DNA analysis as samples that have been directly collected from suspects.

Finally, blood samples can also be collected for DNA analysis. This can be done by taking a sample of blood from a suspect, or by collecting bloodstains from a crime scene. However, it is important to note that bloodstains can be degraded over time, making them less useful for DNA analysis.

In conclusion, there are a variety of methods that can be used to collect biological evidence. The most appropriate method will depend on the type of material that is present, as well as the desired outcome of the DNA analysis. However, all methods have the potential to yield valuable information that can assist in criminal investigations.

Assignment Brief 3: Investigate methods of collection of chemical evidence.

Chemical evidence can be defined as any material that contains trace chemicals or compounds, such as paint, hair, or blood. This type of evidence is often used in forensic investigations to link suspects to specific crimes. There are several different methods that can be used to collect chemical evidence from a crime scene.

One common method is collecting samples using specialized equipment. This can involve using a vacuum cleaner to collect dust or debris, or using a syringe to collect liquid samples. Samples collected in this way can then be analyzed in a laboratory to identify the presence of specific chemicals or compounds.

Another common method of collecting chemical evidence is by taking photographs. Photographs can be used to document the location of evidence, as well as the appearance of any stains or residues. Photographs can also be used to identify potential sources of chemical contamination.

Finally, samples can also be collected by taking swabs from surfaces or objects. This can be done using cotton swabs or other absorbent materials. Swabs can be used to collect samples from a variety of surfaces, including skin and hair, as well as objects such as clothing or shoes.

In conclusion, there are a variety of methods that can be used to collect chemical evidence from a crime scene. The most appropriate method will depend on the type of material that is present, as well as the desired outcome of the analysis. However, all methods have the potential to yield valuable information that can assist in criminal investigations.

Assignment Brief 4: Investigate methods of collection of physical evidence.

Physical evidence can be defined as any material that can be used to link a suspect to a crime. This type of evidence can include items such as fingerprints, hair, or clothing. Physical evidence is often used in forensic investigations to identify suspects and to build cases against them.

There are a variety of methods that can be used to collect physical evidence from a crime scene. One common method is using specialized equipment to collect samples directly from the location where they were found. This can include collecting fingerprints or footprints, as well as taking photographs of any stains or residue on surfaces.

In addition to collecting samples directly from the crime scene, physical evidence can also be collected from suspects. This can involve taking samples of hair, saliva, or blood. Suspects can also be asked to provide fingerprints or footprints voluntarily.

Finally, physical evidence can also be collected from objects that have been removed from the crime scene. This can include items such as clothing, shoes, or weapons. It is important to note that physical evidence can be degraded over time, so it is important to collect and analyze samples as quickly as possible.

In conclusion, there are a variety of methods that can be used to collect physical evidence from a crime scene. The most appropriate method will depend on the type of material that is present, as well as the desired outcome of the analysis. However, all methods have the potential to yield valuable information that can help to solve crimes and bring criminals to justice.

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