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Nov 24, 2024
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Hello Professor and Classmates,
Contrast the collection and packaging requirements for different types of evidence.
Digital Evidence:
Investigators use write-blocking devices to keep the original content.
It must be packaged in evident containers, with labeling and documentation (Smith, 2023).
Biological Evidence:
Direct contact should be avoided and must be stored in a cool and
dry environment, using containers that keep away sunlight exposure. This evidence can be
collected by using swabs or gauze, for example.
Trace Evidence:
Has a variety of collection methods such as tweezers, forceps, and other
specialized equipment. Consideration must be given when packaging trace evidence depending
on the type of evidence.
Explosive Evidence:
A trained explosive handler will collect the evidence, using airtight
containers such as metal cans or plastic bags with sealing mechanisms, preventing leakage or
exposure to environmental factors.
Drug Evidence:
Swabs are used when collecting drug-contaminated surfaces and are
then placed in a suitable container for further analysis. This method proves instrumental in
obtaining potential evidence related to drug use or drug trafficking.
Describe at least three different methods involved in the collection and packaging of
evidence.
One common method used for collecting evidence is swabbing. This involves using sterile
swabs and the correct type of swabs. When packaging you must use sterile and leak-proof
containers. Another method for collecting evidence is vacuuming, using specialized vacuums
designed for forensic purposes using different attachments. Another method of collecting
evidence is using sticky tape.
Contrast between these different collections and packaging of evidence each is
appropriate for.
Swabbing is appropriate to use when collecting DNA evidence such as blood, saliva, or
semen, for example. It can also be used when collecting drug evidence on surfaces like tables
or bags. Vacuuming is used when collecting trace evidence such as hairs and fibers on large
scale areas. Sticky tape is used to collect hair
, fibers, and other trace evidence. For example, on
seats or carpets in cars.
Explain how the different types of collection and packaging of evidence might affect
laboratory testing.
When collecting and packaging digital evidence, failure to adhere to the proper collection and
packaging protocols can lead to compromised evidence and pose potential challenges during
laboratory testing, any alteration or contamination through collection and the packaging process
may undermine its reliability. When collecting and packaging biological evidence such as swabbing of
DNA samples, if the process is done wrong it could lead to invalidated results. If explosives are not
collected or handled appropriately it can lead to fires or explosions, it can react with other chemicals
or vapors that are in the lab and there would no longer be evidence. If trace evidence is not
collected and packed correctly it can become contaminated which has the potential to alter the
composition of laboratory results.
Explain the requirements for the collection and packaging of evidence related to
admissibility.
Investigators must adhere to established protocols for evidence collection and packaging. These
protocols may encompass step-by-step procedures for specific types of evidence, guidelines for
handling and preserving evidence, and procedures for specific types of evidence, guidelines for
handling and preserving evidence, and instructions for maintaining the chain of custody. By following
these protocols, law enforcement agencies, forensic laboratories, and legal professionals can
demonstrate the credibility and reliability of the evidence, thereby enhancing its admissibility in
court (Liverpool John Moores University, 2012).
Liverpool John Moores University. (2012, October 25). Forensic science: Analysis of drugs using
colour tests. [Video File]. Retrieved from
https://youtu.be/hXh8pMvc3-0
Smith, J. (2023). Collection and packaging requirements for biological evidence. In Advances in
Forensic Science, pp. 45-63. Springer.
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