The binding legal principles established are: (1) For the defence of self-defence under section 253 of the Criminal Law (Codification and Reform) Act to succeed, there must be an unlawful attack on the accused, the attack must have commenced or be imminent, the response must be necessary to avert the attack, and the means used must be reasonable in the circumstances; (2) An accused who exceeds the bounds of self-defence cannot rely on that defence even if initially justified in using force; (3) Murder with constructive intent is established where the accused subjectively foresees the real possibility that their conduct will cause death and proceeds recklessly regardless of whether death occurs (dolus eventualis); (4) The assessment of whether self-defence is established requires consideration of the accused's circumstances, knowledge, capability, and any stress or fear operating at the time, but objective evidence of the accused's conduct is determinative; (5) Continuing to assault a victim who is already incapacitated and injured demonstrates an intent beyond lawful self-defence.