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The Use of Forensic Evidence in Modern Criminal Trials
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Executive Summary

  • Forensic evidence must be collected, handled, and analyzed correctly to ensure admissibility in court.
  • Types of forensic evidence:
    • DNA
    • Fingerprint
    • Ballistic
    • Digital
  • Forensic evidence faces challenges like
    • potential contamination
    • human error
    • misinterpretation.
  • The Canadian Criminal Code and the Canada Evidence Act govern the use of forensic evidence in criminal trials.
  • Criminal defense lawyers must understand forensic evidence and its limitations to represent their clients effectively.


Forensic evidence has become an increasingly important aspect of modern criminal trials in Edmonton and Canada. Advances in forensic science have made it possible to gather and analyze evidence more effectively, providing valuable insights into criminal investigations.

This blog post will explore forensic evidence in criminal trials, the types of evidence commonly used, and the challenges associated with relying on forensic evidence.

Forensic Evidence in Criminal Trials: Types and Challenges


Type of Evidence Description Challenges
DNA Evidence
  • Can identify individuals with high certainty
  • Can be collected from various sources (blood, saliva, hair)
  • Highly reliable when properly collected and analyzed
  • Contamination during collection or handling
  • Degradation of DNA over time
  • Incorrect interpretation of DNA mixtures
Fingerprint Evidence
  • Unique to each individual
  • Can place a suspect at a crime scene or link them to objects
  • Widely accepted in courts
  • Partial or smudged prints can be difficult to analyze
  • Incorrect matching due to human error
  • Possibility of forgery or planting of fingerprints
Ballistics Evidence
  • Can link a specific weapon to a crime
  • Can determine the type of weapon used
  • Can provide information about the shooter’s position and distance
  • Damage to bullets or casings can make analysis difficult
  • Incorrect matching due to human error
  • Lack of a comprehensive national database for comparison
Digital Evidence
  • Can establish timelines, motives, and relationships
  • Includes emails, text messages, and social media posts
  • Can be used to corroborate or refute witness testimony
  • The authenticity and integrity of digital evidence can be questioned
  • The rapid advancement of technology can make analysis difficult
  • Large volumes of data can be time-consuming to analyze


Types of Forensic Evidence

There are several types of forensic evidence commonly used in criminal trials, including:

  • DNA Evidence: DNA can be collected from various sources, such as blood, saliva, or hair, and can be used to identify individuals with a high degree of certainty.
  • Fingerprint Evidence: Fingerprints are unique to each individual and can be used to place a suspect at a crime scene or link them to specific objects.
  • Ballistics Evidence: Ballistics analysis examines firearms, bullets, and bullet casings to determine the weapon used and link it to a specific crime.
  • Digital Evidence: With the increasing use of technology, digital evidence such as emails, text messages, and social media posts can be used to establish timelines, motives, and relationships between individuals.

Challenges with Forensic Evidence

While forensic evidence can be a powerful tool in criminal investigations, there are also challenges associated with its use:

  • Contamination: Forensic evidence can be easily contaminated if not collected and handled properly, leading to false conclusions.
  • Human Error: The analysis of forensic evidence is often subject to human interpretation, which can lead to errors or bias.
  • Misinterpretation: Forensic evidence can be complex and difficult to understand, leading to misinterpretation by judges, juries, or even experts.

Legal Framework

The Canadian Criminal Code and the Canada Evidence Act govern the use of forensic evidence in criminal trials. These laws set out the rules for the admissibility of evidence, including the requirement that evidence be relevant, reliable, and not unfairly prejudicial to the accused.

The Role of Criminal Defense Lawyers

The Best Criminal Defense Lawyers in Edmonton ensure that forensic evidence is used fairly and accurately in criminal trials. Lawyers must thoroughly understand the types of forensic evidence commonly used, the challenges associated with its use, and the legal framework governing its admissibility. By effectively challenging the reliability and relevance of forensic evidence, criminal defense lawyers can protect the rights of their clients and ensure a fair trial.


Forensic evidence is a valuable tool in modern criminal trials, but it is not without its challenges. Criminal defense lawyers must stay current on the latest forensic science developments and understand its limitations. By doing so, they can provide effective representation for their clients and ensure that justice is served.

Kolinsky Law is the Best Criminal Defense Lawyer in Edmonton with the track record of massive success in handling criminal cases. Get in touch today.