EU law – Mutual recognition as a justification for EU competence – EU competence in domestic criminal procedure – Test and intensity of judicial review of EU criminal law legislation – Relationship between mutual trust and mutual recognition – Federalism and division of powers between the member states and the EU – Mutual recognition as a constraint to EU action – Presumption of Innocence Directive – Victims’ Rights Directive – Exercise of EU competence in domestic criminal procedure – Justifications for EU action in criminal procedure – Evidence-based legislation in the field of criminal procedure – Mutual trust as a legal and sociological concept – National courts’ compliance with EU law – European arrest warrant.