49. In any case, it is apparen t that the issue as to whether a given person may be considered as one of the closest relatives entitled to reparation has to be determined on a case-by-case basis, depending on the specific circumstances of each case. 50. In the context and circumst ances of the instant case, there is no doubt that many people suffered morally, in varying degrees , from the lack of due diligence on the part of the authorities of the Respond ent State in apprehending, prosecuting and putting to trial the perpetrators of the quadrup le assassination; but one may reasonably consider that those who acted (directly or by representation) on the very front line in this respect and suffered the most from the situation are the spouses , children, fathers and mothers of the deceased. These are therefore the persons who, in the instant case, may claim the status of victim, and therefore lay claim to reparation , if at least the concrete evidence of this status is duly adduced .18 Going by this reservat ion, the persons mentioned in the following paragraphs are entitled to reparation for the moral prejudice suffered : As regards the beneficiaries of Norbert Zongo, the victims are Zongo Somda, Genevie ve (spouse); Zongo Guy Bonaventure (son); Zongo, Antoine (son): Zongo, (i) Arnold (son); Zongo, Judith (daughter); Zongo Constant (son); and Nana Augustine (mother) . (ii) As regards the beneficiaries of Ernest Zongo, the victim is Yameog o, Taiba Rosalie (mother) . (iii) As for the beneficiaries of Blaise llboudo, the victims are lloudo, Jonas (father); and Yanogo, Deborah (mother) . (iv) As regards the beneficiaries of Abdoulaye Nikiema alias Ablasse, the victims are Ouedrao go, Kouiliga (mother) ; and Nikiema Abdoul Kader (son). b) Proof of status of victim 51 . Whereas , basically , apart from cases where marriage certificates have been adduced , and the Applican ts in some cases produced the birth certificates of beneficiaries; or life existence companion, or those determined by the Court based on the characteristics of the case and the of some spectal relationship between the next-of-kin and the VICtim or the facts of the case" 1a See infra, para. 54 17