The state andFederal Rules of Evidence, which govern the admissibility of evidence in civil actions and criminal proceedings, impose requirements that must be met before the testimony of an eyewitness can be presented during trial. For example, an eyewitness must be competent (legally fit) and qua...
Furthermore, states are bound by Constitutional order requirements following the rule of law; involving principles of legality, legal certainty, equality, proportionality, and respect for fundamental rights, such as of property, association and voice. (Note that by contrast, totalitarian states assume ...