(59) Given their role and responsibility, actions by law enforcementlaw enforcementmeans activities carried out by law enforcement authorities or on their behalf for the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, including safeguarding against and preventing threats to public securityArticle 3(46) authorities involving certain uses of AI systems are characterised by a significant degree of power imbalance and may lead to surveillance, arrest or deprivation of a natural person’s liberty as well as other adverse impacts on fundamental rightsfundamental rightsIncludes human dignity, right to life, prohibition of torture, protection of personal datapersonal dataAny information relating to an identified or identifiable natural person ('data subjectsubjectfor the purpose of real-world testing, means a natural person who participates in testing in real-world conditionsArticle 3(58)data subjectsubjectfor the purpose of real-world testing, means a natural person who participates in testing in real-world conditionsArticle 3(58)An identified or identifiable natural person to whom personal data relateGDPR Art. 4(1)'). Includes name, ID number, location data, online identifiers, or factors specific to physical, physiological, genetic, mental, economic, cultural or social identityGDPR Art. 4(1), freedom of expression, non-discrimination, equality between women and men, rights of the child, right to an effective remedy and fair trialCharter of Fundamental Rights Art. 1–54 guaranteed in the Charter. In particular, if the AI systemAI systemmeans a machine-based system that is designed to operate with varying levels of autonomy and that may exhibit adaptiveness after deployment, and that, for explicit or implicit objectives, infers, from the input it receives, how to generate outputs such as predictions, content, recommendations, or decisions that can influence physical or virtual environmentsArticle 3(1) is not trained with high-quality data, does not meet adequate requirements in terms of its performance, its accuracy or robustness, or is not properly designed and tested before being put on the market or otherwise put into service, it may single out people in a discriminatory or otherwise incorrect or unjust manner. Furthermore, the exercise of important procedural fundamental rightsfundamental rightsIncludes human dignity, right to life, prohibition of torture, protection of personal datapersonal dataAny information relating to an identified or identifiable natural person ('data subjectsubjectfor the purpose of real-world testing, means a natural person who participates in testing in real-world conditionsArticle 3(58)data subjectsubjectfor the purpose of real-world testing, means a natural person who participates in testing in real-world conditionsArticle 3(58)An identified or identifiable natural person to whom personal data relateGDPR Art. 4(1)'). Includes name, ID number, location data, online identifiers, or factors specific to physical, physiological, genetic, mental, economic, cultural or social identityGDPR Art. 4(1), freedom of expression, non-discrimination, equality between women and men, rights of the child, right to an effective remedy and fair trialCharter of Fundamental Rights Art. 1–54, such as the right to an effective remedy and to a fair trial as well as the right of defence and the presumption of innocence, could be hampered, in particular, where such AI systems are not sufficiently transparent, explainable and documented. It is therefore appropriate to classify as high-risk, insofar as their use is permitted under relevant Union and national law, a number of AI systems intended to be used in the law enforcementlaw enforcementmeans activities carried out by law enforcement authorities or on their behalf for the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, including safeguarding against and preventing threats to public securityArticle 3(46) context where accuracy, reliability and transparency is particularly important to avoid adverse impacts, retain public trust and ensure accountability and effective redress. In view of the nature of the activities and the risks relating thereto, those high-risk AI systems should include in particular AI systems intended to be used by or on behalf of law enforcementlaw enforcementmeans activities carried out by law enforcement authorities or on their behalf for the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, including safeguarding against and preventing threats to public securityArticle 3(46) authorities or by Union institutions, bodies, offices, or agencies in support of law enforcementlaw enforcementmeans activities carried out by law enforcement authorities or on their behalf for the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, including safeguarding against and preventing threats to public securityArticle 3(46) authorities for assessing the risk of a natural person to become a victim of criminal offences, as polygraphs and similar tools, for the evaluation of the reliability of evidence in in the course of investigation or prosecution of criminal offences, and, insofar as not prohibited under this Regulation, for assessing the risk of a natural person offending or reoffending not solely on the basis of the profilingprofilingAny form of automated processing of personal data to evaluate personal aspects relating to a natural person — in particular to analyse or predict aspects concerning work performance, economic situation, health, personal preferences, interests, reliability, behaviour, location or movementsGDPR Art. 4(4) of natural persons or the assessment of personality traits and characteristics or the past criminal behaviour of natural persons or groups, for profilingprofilingAny form of automated processing of personal data to evaluate personal aspects relating to a natural person — in particular to analyse or predict aspects concerning work performance, economic situation, health, personal preferences, interests, reliability, behaviour, location or movementsGDPR Art. 4(4) in the course of detection, investigation or prosecution of criminal offences. AI systems specifically intended to be used for administrative proceedings by tax and customs authorities as well as by financial intelligence units carrying out administrative tasks analysing information pursuant to Union anti-money laundering law should not be classified as high-risk AI systems used by law enforcementlaw enforcementmeans activities carried out by law enforcement authorities or on their behalf for the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, including safeguarding against and preventing threats to public securityArticle 3(46) authorities for the purpose of prevention, detection, investigation and prosecution of criminal offences. The use of AI tools by law enforcementlaw enforcementmeans activities carried out by law enforcement authorities or on their behalf for the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties, including safeguarding against and preventing threats to public securityArticle 3(46) and other relevant authorities should not become a factor of inequality, or exclusion. The impact of the use of AI tools on the defence rights of suspects should not be ignored, in particular the difficulty in obtaining meaningful information on the functioning of those systems and the resulting difficulty in challenging their results in court, in particular by natural persons under investigation.