| The People (AG) v Dwyer [1972] IR 416 | Common-law test for self-defence in homicide; partial defence reducing murder to manslaughter when excessive but honestly believed force is used. | Considered whether it survives after the 1997 Act; ultimately held superseded by statute. |
| Non-Fatal Offences Against the Person Act 1997 (ss. 18, 19, 22) | Statutory definition of lawful use of force and abolition of common-law defences. | Held to apply to fatal as well as non-fatal offences; s. 22 abolishes common-law self-defence. |
| The People (DPP) v Barnes [2007] 3 IR 130 | Discussion of subjective/objective elements in assessing force against a burglar. | Referenced in analysing mixed test and anomalies between fatal and non-fatal law. |
| The People (DPP) v Farrell [2014] IECCA 42 | Judicial remarks on post-1997 self-defence. | Cited for argument that law has evolved; court distinguished. |
| The People (AG) v Keatley [1954] IR 12 | Manslaughter requires an unlawful killing; use of force must be necessary and proportionate. | Used to trace historical linkage between assault and homicide. |
| The People (AG) v Quinn [1965] IR 366 | Self-defence in homicide context. | Cited as early authority aligning with Keatley. |
| R v Howe (1958) 100 CLR 448 | Australian authority that excessive but honestly believed force reduces murder to manslaughter. | Formed basis of the certified question in Dwyer. |
| DPP v Smith [1961] AC 290 | Intention in murder; prompted statutory reform. | Background to enactment of s. 4 Criminal Justice Act 1964. |
| The People (DPP) v Clarke [1994] 3 IR 289 | Subsequent consideration of self-defence. | Cited but not decisive. |
| The People (DPP) v Quinn [2015] IECA 308 | Interpretation of s. 18 defence as wholly subjective. | Contrasted with present decision preferring mixed test. |
| The People (DPP) v O’Brien [2016] IECA 146 | Further support for wholly subjective view. | Rejected by Supreme Court as incorrect. |
| Brown v United States (1921) 256 US 335 | No detached reflection required when facing danger. | Quoted to illustrate proportionality concept. |
| DPP v Morgan [1976] AC 182 | Subjective belief standard in consent (rape) cases. | Analogy for subjective honest-belief element in s. 18. |
| R v Kimber (1983) 77 Cr App R 225 | Subjective belief in consent. | Cited with Morgan in Gladstone Williams discussion. |
| R v Gladstone Williams (1984) 78 Cr App R 276 | Self-defence judged on circumstances as accused believed. | Paralleled but distinguished in analysing 1997 Act. |
| The People (DPP) v Heffernan [2017] IESC 5 | Comments on predominance of objective standard. | Used to critique wholly subjective approach. |
| Dunne v DPP [2016] IESC 24 | Sequential prosecutions when victim later dies. | Cited in anomaly discussion. |
| Cosgrave v DPP [2012] IESC 24 | Criteria for second prosecution after earlier conviction. | Referenced in anomaly discussion. |
| People (DPP) v Brown [2018] IESC 67 | 1997 Act reformed assault law. | Support for view that statutory scheme supplanted common law. |
| People (DPP) v AC [2021] IESC 74 | Modern approach to statutory interpretation. | Guided the Court’s interpretative methodology. |
| Heather Hill Management Co. v An Bord Pleanála [2022] IESC 43 | Language–context–purpose triad in interpretation. | Applied in construing s. 22. |
| A, B & C v Minister for Foreign Affairs [2023] IESC 10 | Further authority on purposive interpretation. | Quoted for interpretative principles. |
| Attorney General (Fahy) v Bruen (No. 2) [1937] IR 125 | Words given ordinary meaning unless contrary to purpose. | Relied on by Respondent; not accepted as limiting statute. |
| Minister for Industry & Commerce v Hales [1967] IR 50 | Long-title cannot override clear language. | Used analogically in statutory-purpose debate. |
| People (DPP) v Quilligan [1986] IR 495 | Long-title and statutory interpretation. | Cited to illustrate limits of long-title usage. |
| Grealis & Corbett v DPP [2001] IESC 50 | Effect of abolishing common-law offences. | Analogous to abolition of common-law defences in s. 22. |