Human rights — Inhuman or degrading punishment — Death penalty — Prolonged delay between sentence and execution — Appropriateness of appeal procedures — Lack of culpability of condemned prisoners in causing inordinate delays — “Death row phenomenon” — Section 15(1) of Constitution of Zimbabwe protecting fundamental rights of individual — Whether prolonged delay amounting to inhuman treatment — Whether proposed execution would contravene Section 15(1) of Constitution — The law of Zimbabwe