The subject of this thesis is police violence as a violation of Art. 3. of the European Convention on Human Rights but with special emphasis on violence against migrants. The prohibition of torture is a ius cogens norm with no legal ability of being limited under any circumstances. Definition of torture is provided in the UN Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment. It is defined as any act by which severe pain or suffering, whether physical or mental, is intentionally inflicted on a person for such purposes as obtaining information or a confession, punishing, intimidating or coercing, or for any reason based on discrimination of any kind, when such pain or suffering is inflicted by or at the instigation of or with the consent or acquiescence of a public official or other person acting in an official capacity. The subject is based on jurisprudence of the European Court of Human Rights with special emphasis on several judgments : Mafalani v. Croatia, V. D. v. Croatia, Gäfgen v. Germany, Aydin v. Turkey, Selmouni v. France and M. H. and others v. Croatia. Literature concerning this thesis is based on jurisprudence, scientific articles, legal manuals and books. Concerning violence against migrants, this thesis explains acts of Croatian police and their activity on Croatian borders. With that in mind, this thesis is based on judgment M. H. and others v. Croatia as a violation of Art. 3. of the Convention when describing accommodation in Tovarnik transit detention centre but also a violation of Art. 2. of the Convention when describing police action towards the applicants. Moreover, it considers influence of current report of Council of Europe anti-torture Committee (CPT) but also some media reports concerning the significance of this subject. Police officers are the most significant representatives of legal and state coercion, but with that in mind, they should be aware of their task of keeping state and EU territory safe with providing preservation of basic human rights. The subject of this thesis needs to be interpreted in light of current circumstances, keeping in mind the importance of police education concerning every deprivation of liberty, but also keeping state territory safe.