(c) The District Court failed to take as a starting point for establishing the relevant facts the police report that had been made at the time of the death; (d) The eyewitness Dragan Markovic did mention in his only statement the presence at the scene of police officers Z. Jeftic and S. Isailovic and not the presence of the three defendant police officers; (e) The Šabac Police Department failed to provide the photographs taken at the scene of the incident, as a result of which the investigating judge transmitted incomplete documentation to the public prosecutor; (f) When the parents of the alleged victim proceeded in the capacity of private prosecutor, the investigating judge failed to order the exhumation of the body of the alleged victim and a new autopsy, at the same time agreeing that the original autopsy "had not been performed in line with all the rules of forensic medicine"; (g) Yugoslav prosecuting authorities failed to hear numerous other witnesses proposed by the author. 8.4 Regarding the State party's contention that the alleged victim had previously attempted to commit suicide, the author indicates that the State party does not substantiate its claim with medical records or police reports, which are usually available in such cases. With regard to other rumours concerning the alleged victim, inter alia that he was addicted to drugs, the author notes that they have always been denied by the family. The author does not know when or whether the four friends of his son were interrogated and neither he nor his lawyer was ever notified of such an interrogation. Moreover, the author notes that three of these witnesses may have been subjected to pressure and influenced for various reasons. 8.5 Concerning the obligation to investigate incidents of torture and cruel, inhuman or degrading treatment or punishment, the author refers to the jurisprudence of the Committee in the case Encarnación Blanco Abad v. Spain (CAT/C/20/D/59/1996), where the Committee observed that "under article 12 of the Convention, the authorities have the obligation to proceed to an investigation ex officio, wherever there are reasonable grounds to believe that acts of torture or ill-treatment have been committed and whatever the origin of the suspicion". He also refers to the decision in the case Henri Unai Parot v. Spain (CAT/C/14/D/6/1990), according to which the obligation of a prompt and impartial investigation exists even when torture has merely been alleged by the victim, without the existence of a formal complaint. The same jurisprudence is confirmed by the European Court of Human Rights (Assenov and Others v. Bulgaria (90/1997/874/1086)).