This the fourth edition gives an up-to-date account of the law of evidence in Ireland. The text is of interest to all those working in the Irish legal system, the criminal legal system in particular as well as to policy makers and those studying more general issues related to matters of trial, adjudication and fact-finding in various contexts. It explores the development of a particular Irish dimension to evidence scholarship, which is based on constitutional notions of fairness. In light of the incorporation of the ECHR, this must continue to be influential in this and possibly other jurisdictions. The phenomenon of the Special Criminal Court is considered and ithe Criminal Justice (Forensic Evidence and DNA Database System) Act 2014 is also considered in detail.