5.  The applicant was born in 1976 and lives in Budapest. 6.  On 20 July 2015 a quarrel broke out between the applicant and his common-law wife, H.M. The latter called an ambulance because the applicant was under the influence of alcohol and was behaving oddly, and had a violent outburst. 7.  At about 4.40 p.m., instead of an ambulance, police officers E.Sz. and T.Z. appeared at the applicant’s flat, handcuffed the applicant and took him to the Orosháza police department, arriving there at about 5.10 p.m. 8.  According to the applicant he had no injuries when he was put into the police car. He was allegedly assaulted at the police station. While he was handcuffed and in the room for short-term arrestees, one of the three police officers present either kicked or pushed him from behind onto the floor. He hit his face and nose, which started to bleed. He also suffered injuries to his teeth. He fainted and when he regained consciousness, about fifteen minutes later, he found himself handcuffed to a bench, his knees hurting. His request for help was allegedly disregarded by the police officers at first, but when it became apparent that he could not walk, he was taken to hospital. 9.  At 7.45 p.m. the applicant was examined by Dr CS.H. at Orosháza Hospital. He had bruises on the bridge of his nose and around his two wrists, abrasions on his right thigh, scratches below his left knee, and his left tibia was broken. He was hospitalised following the examination. 10.  On 22 July 2015 the applicant was examined by Dr CS.H. of the Department of Traumatology, and further injuries were noted on his body: bruises on his upper left arm, an abrasion around the right side of his collar‑bone, scratches around the left side of his collar-bone, bruises on both sides of his hips, two loose teeth, one broken and one missing tooth in the upper jaw. 11.  The head of Orosháza police station of his own motion filed a criminal complaint against unknown perpetrators alleging “ill-treatment committed in the course of official proceedings”. The Central Investigation Office opened an investigation into ill-treatment committed in the course of official proceedings, assault causing actual bodily harm, and grievous bodily harm. 12.  In his testimony the applicant stated that he had been kicked from behind when taken into custody. At that time he had been handcuffed and had fallen onto his face on the floor, as a consequence of which his nose had started to bleed. He explained that he had remained unconscious for 15‑20 minutes and when he had regained consciousness, his nose had been bleeding and he had felt pain in his knee. He had asked for help, but only when the police officers realised that he was unable to stand unaided had he been taken to hospital. 13.  H.M. was questioned as a witness. Describing the circumstances of the incident before the police arrived she stated that the applicant had not mentioned to her before the incident that he had hurt his leg. She also stated that on the day of the incident the applicant had been found by her daughter lying on the kitchen floor. She confirmed the applicant’s version of events in so far as she maintained that she had seen no injuries on the applicant when he was put into the police car. 14.  K.B., the daughter of H.M., also questioned as a witness, stated that on 20 July 2015 at around 12.30 p.m. she had found the applicant lying on the kitchen floor and not breathing. She proceeded to wake him up and could tell that he had been drinking alcohol. She had also seen the applicant earlier that day falling over in the yard, but he had sustained only minor injuries to his arm and leg. 15.  According to the police report, when the police officers arrived at the applicant’s flat, the applicant was sitting on the floor and was unable to communicate. He did not identify himself, despite the officers’ order. When the police officers tried to handcuff him, he resisted, swinging his head from side to side. He fell to the ground and his nose started bleeding. He could only be put in the police car with the use of force, and when inside it he kept insulting the police officers. At the police station he continued to behave aggressively and tried to hit his head against the floor. He therefore had to be handcuffed and laid on the floor. He was not injured during these measures and his handcuffs were removed when he calmed down at around 7 p.m. He refused to be examined by a doctor. 16.  The Central Investigation Office also questioned E.Sz. and T.Z. and two other police officers who had been on duty at the police station at the time of the applicant’s placement in the room for short-term arrestees, and a third officer who had come on duty at around 6 p.m. the same day. E.Sz. and T.Z. confirmed what was in the police report and the other three witnesses denied any knowledge of ill-treatment having been inflicted on the applicant. They all stated that the applicant had been drunk and had been handcuffed to prevent him causing harm to himself. 17.  The two members of the medical staff of Orosháza Hospital who had been present during the applicant’s treatment could not recall the event in detail but remembered that the applicant had not complained about ill‑treatment by the police officers and, although limping, was able to walk unaided to the x-ray examination room. 18.  On 1 November 2015 the medical expert appointed by the Central Investigation Office expressed the opinion that the applicant’s leg had been broken one or two weeks prior to the incident and that it could not be determined whether the injuries to his teeth had been caused before or during his detention for questioning at the police station. According to the expert opinion, it was implausible that the applicant would have been capable of reconstructing the events of the day, owing to his drunkenness. 19.  On 17 December 2015 the Central Investigation Office discontinued the criminal proceedings for lack of any conclusive evidence (as regards ill‑treatment committed in the course of official proceedings and assault causing actual bodily harm) and for the absence of a crime (as regards causing grievous bodily harm). According to the Investigation Office, it could not be established which injuries occurred during the police measures and whether they were caused by ill-treatment or the applicant’s own behaviour. The decision also stated that the applicant’s tibia could not have been broken during the incident and that the applicant’s credibility was questionable due to his drunkenness. 20.  The applicant filed a complaint against the discontinuation order. He maintained that his colleagues and supervisors, as well as the members of his household could have confirmed that he had no leg injury before the incident if they were heard as witnesses or if specific questions were put to them in this regard. He also submitted that Dr CS.H. (see paragraph 9 above) had been biased and questioned the credibility of the statement in the expert opinion of 1 November 2015 concerning his drunkenness (see paragraph 18 in fine above). 21.  On 18 February 2016 the chief prosecutor’s office dismissed the complaint. It endorsed the first-instance decision concerning the assessment of evidence and the legal classification thereof, informing the applicant of the possibility of pursuing substitute private prosecution proceedings.