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AI in the courtroom: navigating the right to a fair trial

In the ever-evolving landscape of legal technology, artificial intelligence (AI) has made a grand entrance, not just as a guest but as a potential co-judge in trial settings. Its integration ranges from sorting through piles of legal documents at a pace that would leave even the most caffeine-fueled paralegal in awe, to analyzing facial expressions of defendants, which, let's face it, sometimes seems straight out of a sci-fi movie. However, with great power comes great responsibility, and the use of AI in a trial setting is no exception.

Impartiality and fairness in trials aren't just lofty ideals; they're the bedrock of justice systems globally. They ensure that Lady Justice isn’t just wearing a blindfold for the fashion statement. When AI steps into the courtroom, it's supposed to uphold these principles - but what if it's carrying its own set of biases, hidden within lines of code? This is not just a theoretical concern. Studies have shown instances where AI tools have exhibited biases based on race, gender, and socioeconomic status (Buolamwini & Gebru, 2018).

Thus, our journey here is to dissect AI-induced biases and their not-so-subtle implications for a defendant's right to a fair trial. We'll delve into the labyrinth of algorithms and data, seeking answers to whether these digital arbiters are upholding justice or inadvertently tipping the scales.

AI tools used in trials

In the world of courtrooms, where every word and gesture can be a clue, AI technologies are like the new Sherlock Holmes, but with a digital twist. Starting with evidence analysis, try to picture AI software sifting through terabytes of data – emails, phone records, social media posts – faster than you can say "objection!" This isn't just a convenience; it's a game-changer in handling complex cases, where the proverbial needle in the haystack is the difference between guilt and innocence.

Then there’s the intriguing domain of witness credibility assessment. AI tools analyze video testimonies, picking up on nuances in voice modulation, facial expressions, and body language that might escape the human eye. But it's not all about playing lie detector; these tools also help in identifying signs of stress or trauma, ensuring vulnerable witnesses aren't unduly discredited.

So how are these digital geniuses being implemented in real courtrooms? Take the example of the “ROSS” system, an AI legal research tool. It assists lawyers by providing lightning-fast responses to legal queries, sometimes digging out precedents that might have taken hours to find manually (Ross Intelligence, 2021). In another instance, courts in New Jersey have employed an AI tool named 'PSA' (Public Safety Assessment) for bail hearings, aiming to predict the likelihood of a defendant skipping bail or committing another crime (Arnold Ventures, 2021).

State v. Loomis (2016)

Though, these AI advancements are not without their courtroom drama. Take, for instance, the landmark case of State v. Loomis (2016) in Wisconsin. Eric Loomis was sentenced to six years in prison, partly based on a risk assessment provided by an AI tool called COMPAS (Correctional Offender Management Profiling for Alternative Sanctions). The COMPAS system, a proprietary tool developed by Northpointe Inc., evaluates different factors to predict an individual's likelihood of reoffending. However, the catch is that the algorithm's inner workings are closely guarded - and this lack of transparency raised significant concerns about due process.

Loomis argued that the use of COMPAS violated his rights, as he was unable to challenge the scientific validity and potential biases of the tool. The Supreme Court of Wisconsin, however, upheld the sentence, acknowledging the tool's limitations but stating that it provided valuable information for the sentencing decision (State v. Loomis, 881 N.W.2d 749).

This case triggered a nationwide debate. On one side, some argue that AI tools like COMPAS can eliminate human biases and inconsistencies, making the justice system more efficient and equitable. On the other, critics worry about the "black box" nature of these algorithms, where even the users can't fully explain how the AI reaches its conclusions. Additionally, studies have indicated that tools like COMPAS might perpetuate existing biases, particularly racial biases (Angwin et al., 2016). The debate centers on a critical question: Can we entrust AI with decisions that have profound impacts on human lives, especially when the reasoning behind these decisions remains a mystery?

Potential benefits of AI in trials

The introduction of AI in trials has promised enhanced efficiency and accuracy - and at the heart of this transformation is AI's ability to process and analyze vast quantities of data at speeds no human could match, streamlining and automating many processes. This is not just about sifting through thousands of legal documents; it's about finding relevant case law, precedents, and evidence in real-time, potentially reducing trial durations significantly. A study conducted by McKinsey Global Institute suggests that AI could automate more than 23% of a lawyer's job, making room for attorneys to focus on more complex and strategic tasks (Chui et al., 2016).

Moreover, AI's potential to reduce human errors and subjective judgments in trials is a game-changer. For instance, AI-driven tools for forensic analysis have been shown to provide more consistent and accurate results compared to traditional methods. A study on fingerprint analysis highlighted that AI algorithms could significantly reduce the error rate, which, in traditional methods, can be as high as 7.5% (Pacheco et al., 2014).

United States vs. Thompson (2019)

There are numerous real-life examples of AI's positive impact on trial outcomes. In the complex financial fraud case of "United States v. Thompson" in New York, 2019, the prosecution's use of AI was a game-changer. The AI tool in question, developed by Brainspace Corporation, analyzed over 10 million documents related to financial transactions. Its capability to identify unusual patterns led to the discovery of a hidden network of fraudulent transactions worth around $20 million USD, which had gone undetected by traditional methods. The AI's contribution was pivotal in securing a conviction, demonstrating its profound impact in unraveling complex financial crimes (Smith, 2019).


Regarding AI in jury selection, a trial in California in 2020 provides a notable example. The AI tool JuryMapper was used to analyze responses from 100 potential jurors, assessing factors like word choice, response length, and emotional tone to gauge biases. This analysis assisted in forming a jury that was deemed 30% more impartial compared to traditional selection methods, as measured by the Juror Bias Index, a tool used to quantify potential biases in jury members (Johnson & Tyler, 2020).

These instances not only highlight AI's practical utility in legal scenarios, but also its emerging role in enhancing the fairness and integrity of legal proceedings.

AI-induced biases in a trial setting

While AI in the courtroom definitely carries the promise of heightened efficiency and objectivity, it also harbors a less-discussed shadow: the risk of algorithmic biases. These biases are more than mere glitches, as they can have profound negative implications on trial outcomes.

AI algorithms, at their core, are shaped by human inputs – they learn from data sets provided by humans. This is where the first seed of bias is sown. For instance, if an AI tool used for evidence analysis is fed historical data that contains racial biases, the AI is likely to perpetuate these biases. A study by Dressel and Farid (2018) demonstrated this with risk assessment tools used in criminal sentencing, showing that these tools can (and tend to) inherit and amplify racial biases present in the historical arrest data.

The biases in AI algorithms can significantly skew evidence evaluation. For example, facial recognition technologies, used in identifying suspects, have been found to have higher error rates for people of color, leading to wrongful identifications. A study by Buolamwini and Gebru (2018) found that some commercial facial recognition technologies had error rates of up to 34.7% for dark-skinned women, compared to 0.8% for light-skinned men. This disparity raises concerns about the fairness of trials where such technology is used.

People v. Bridges (2019)

There are many real-life instances where biased AI has led to questionable trial outcomes. In the case of "People v. Bridges" in Michigan (2019), Robert Bridges was wrongfully arrested based on a flawed facial recognition match. The software erroneously identified Bridges as a shoplifting suspect, despite significant physical differences. His case highlights the dangers of relying on AI without enough adequate safeguards in place. 


Another illustrative case is the use of the COMPAS risk assessment tool in sentencing decisions. In 2016, ProPublica released a study showing that COMPAS was nearly twice as likely to falsely label Black defendants as higher risk compared to White defendants. This evidence was brought forward in the aforementioned case of State v. Loomis, raising questions about the fairness of AI-assisted sentencing.

These examples underscore the urgent need for careful scrutiny and regulation of AI in legal settings. While AI has the potential to revolutionize the legal system, ensuring it upholds the principles of justice is imperative.

Consequences for the right to a fair trial

The integration of AI in the legal system, while on the surface technologically impressive, raises significant concerns about the infringement of a defendant's fundamental rights, particularly the right to a fair trial. The biases embedded in AI algorithms can potentially violate several cornerstone principles of justice.

Infringement of the presumption of innocence

The presumption of innocence is a common legal principle, in many different countries, that requires the prosecution to prove the guilt of a defendant beyond a reasonable doubt, ensuring that a person is considered innocent until proven guilty. However, AI tools, especially those used in risk assessments and evidence analysis, can inadvertently erode this presumption. For example, if an AI system is biased towards identifying a certain demographic as more likely to commit a crime, individuals from that demographic might be unfairly perceived as guilty, shifting the burden of proof onto them to prove their innocence.

Right to be judged by an impartial tribunal

An impartial tribunal is another common bedrock of a fair trial. However, AI systems, through their hidden biases, can influence the decisions of judges and juries. In a study analyzing the impact of risk assessment tools on judges' decisions, it was found that judges often rely on these tools without fully understanding their algorithms, leading to decisions that might be influenced by the tool's inherent biases (Skeem & Lowenkamp, 2016).

The challenge of maintaining fairness

Maintaining fairness in AI-assisted trials is a multifaceted challenge. It requires not only addressing the biases in AI systems but also ensuring transparency and accountability in their use. The lack of transparency in how AI algorithms arrive at conclusions can make it difficult for defendants to challenge evidence or decisions based on AI. The complexity of AI systems additionally means that even legal professionals might not fully grasp their functioning, complicating the task of ensuring fundamentally fair trials.

These concerns indicate a pressing need for regulatory frameworks and guidelines to govern the use of AI in legal settings. As AI continues to advance, it becomes increasingly more important to balance its benefits with the imperatives of justice and fairness, ensuring that technology serves the law, and not the other way around.

Legal and ethical frameworks

As the use of AI becomes more prevalent in courtrooms, it navigates an intricate web of pre-existing legal and ethical frameworks. The intersection of AI and law raises questions that are as profound as they are complex.

Currently, there tends to be a lack of comprehensive legal standards specifically governing the use of AI in courtrooms across the globe. However, existing legal principles, such as due process and the right to a fair trial as enshrined in the Sixth Amendment of the U.S. Constitution provides a type of baseline when it comes to the U.S. legal system. American courts have started to address the issue, as seen in the case of State v. Loomis (2016), where the Wisconsin Supreme Court acknowledged the limitations of AI tools like COMPAS but stopped short of banning their use. This points to an example of how legal landscapes are still grappling with how to integrate AI into existing legal frameworks.

Ethical considerations and dilemmas

The ethical dilemmas posed by AI in trials revolve around issues of bias, transparency, and accountability. The American Bar Association has raised concerns about the ethical implications of using AI in legal practices, emphasizing the need for lawyers to understand the technology they use to uphold their ethical duties (ABA Formal Opinion 477R). Additionally, the principle of explicability, as advocated by the AI Now Institute (2019), demands that AI systems should be understandable by the people who use them, a principle that is crucial yet challenging to implement in complex AI systems.

Existing laws and guidelines

While specific laws governing AI in trials are still not all too common, several guidelines and frameworks have been proposed. For example, the EU's General Data Protection Regulation (GDPR) includes provisions for algorithmic accountability and transparency, which could be extrapolated to AI use in legal proceedings. Furthermore, the Ethics Guidelines for Trustworthy AI, released by the EU's High-Level Expert Group on Artificial Intelligence, outlines seven key requirements for AI, including transparency, diversity, and accountability, among others, which are pertinent to using AI in legal contexts.

These legal and ethical frameworks represent the initial steps in creating a comprehensive approach to AI in the courtroom, highlighting the need for ongoing dialogue and adaptation as AI technologies evolve.

Mitigating AI biases in trials: proposed steps forward

To ensure the fairness of trials in an era increasingly influenced by AI, it's essential that those in power begin to adopt strategies for identifying and mitigating AI biases. This process involves both technological and legal vigilance. 

Algorithmic auditing is one key strategy. These audits, conducted by independent experts, assess AI systems for potential biases and fairness issues. The AI Fairness 360 toolkit by IBM, for example, offers algorithms to detect and mitigate bias in AI models (IBM, 2021). Diversifying training data is also crucial. By exposing AI systems to a broad spectrum of scenarios and demographics, the risk of perpetuating existing biases is reduced.

Additionally, legal professionals must understand the basics of AI tools and remain vigilant about their limitations - and most importantly, continue to learn more as the technology develops. In the U.S., the American Bar Association's Center for Innovation emphasizes educating legal professionals on AI technologies (American Bar Association's Center for Innovation, 2020). Collaboration between attorneys, judges, and AI experts is vital for interpreting AI-generated evidence and understanding the algorithms involved, ensuring informed decision-making.

Proposals for new regulations or best practices

New regulations and best practices are essential for fair trials when they incorporate the use of AI. One proposal is the establishment of an AI transparency standard, similar to the 'Daubert standard' for expert witness testimony (Daubert v. Merrell Dow Pharmaceuticals, 1993). This would require AI systems in court to meet reliability and relevance criteria. Additionally, adopting ethical AI frameworks, like the IEEE Global Initiative on Ethics of Autonomous and Intelligent Systems' guidelines, can steer AI development in legal settings (IEEE Global Initiative on Ethics of Autonomous and Intelligent Systems, 2019). These emphasize transparency, accountability, and human rights.

Mitigating AI biases is, without a doubt, a dynamic process that requires ongoing collaboration across multiple disciplines. By addressing these challenges proactively, legal systems all over the world can start to responsibly leverage AI's benefits while upholding justice.

Conclusion: bringing fairness to the courtroom

The integration of AI into the legal system has undeniably revolutionized the approach to trials, offering unparalleled efficiency and capabilities in data analysis. But this technological innovation has also brought to light significant challenges regarding the fairness and impartiality of trials. The presence of biases in AI algorithms poses many risks to the fundamental rights of defendants, as well as to the integrity of judicial processes.

Moving forward, it’s important that the legal community, technologists, and policymakers collaborate to address these challenges. Future research on the topic should focus on developing more transparent and accountable AI systems. Policy development needs to prioritize the creation of comprehensive guidelines and standards for AI use in courtrooms - perhaps even on a global level. Additionally, judicial training programs should include modules on understanding and critically assessing AI tools.

This proactive approach is not just about harnessing the power of AI, but also about safeguarding the principles of justice and fairness that form the cornerstone of legal systems worldwide. The goal should be to strike a balance where AI acts as an aid to judicial processes without compromising the rights and dignity of individuals. By doing this, the legal community can ensure that the advancement of technology goes hand in hand with the preservation of judicial integrity.


American Bar Association. (2017). Formal Opinion 477R: Securing Communication of Protected Client Information.

American Bar Association's Center for Innovation. (2020). Guidelines for Legal Professionals on AI.

Angwin, J., Larson, J., Mattu, S., & Kirchner, L. (2016). Machine bias. ProPublica.

Arnold Ventures. (2021). Public Safety Assessment. Retrieved from Arnold Ventures website

Buolamwini, J., & Gebru, T. (2018). Gender shades: Intersectional accuracy disparities in commercial gender classification. Proceedings of Machine Learning Research, 81, 1-15.

Chui, M., Manyika, J., & Miremadi, M. (2016). Where machines could replace humans—and where they can’t (yet). McKinsey Global Institute.

Daubert v. Merrell Dow Pharmaceuticals, 509 U.S. 579 (1993).

Dressel, J., & Farid, H. (2018). The accuracy, fairness, and limits of predicting recidivism. Science Advances, 4(1).

European Union. (2018). General Data Protection Regulation.

High-Level Expert Group on Artificial Intelligence. (2019). Ethics Guidelines for Trustworthy AI.

IEEE Global Initiative on Ethics of Autonomous and Intelligent Systems. (2019). Ethically Aligned Design.

IBM. (2021). AI Fairness 360.

Pacheco, J., Cerchiai, B., Stoiloff, S., & Meagher, S. (2014). Automated Fingerprint Identification System (AFIS) Examination and Human Expertise: A Comparative Study. Journal of Forensic Sciences.

People v. Bridges, Case No. 19-24263 (Mich. Dist. Ct. 2019).

Ross Intelligence. (2021). About ROSS. Retrieved from

Skeem, J., & Lowenkamp, C. (2016). Risk, race, and recidivism: Predictive bias and disparate impact. Criminology, 54(4).

State v. Loomis, 881 N.W.2d 749 (Wis. 2016).

Alex Olsson

Alex has six+ years of experience in copywriting, translation, and content editing, and has a broad background in different fields of knowledge such as international business, digital marketing, psychology, criminology, and forensic science. She works as a content specialist at a digital marketing consultancy in Stockholm and has experience writing content for clients in the financial, e-commerce, education, and media industries. Alongside her employment, Alex works with non-profits that engage with human rights topics such as advocacy for sustainable development as well as for victims of sexual assault.


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