Case C-54/20 P: Judgment of the Court (Second Chamber) of 5 May 2022 — European Commission v Stefano Missir Mamachi di Lusignano and Others (Appeal — Civil service — Non-contractual liability of the European Union based on a failure of an institution to fulfil its duty to ensure the protection of its officials — Delegation of the European Commission in Morocco — Murdered official — Non-material damage suffered by the official’s brother and sister — Remedy — Articles 270, 268 and 340 TFEU — Staff Regulations of Officials of the European Union — Articles 40, 42b, 55a, 73, 90 and 91 — Concept of a ‘person to whom the Staff Regulations apply’ — Statement of reasons)