5.  The applicant was born in 1958 and lives in St Petersburg. She is the mother of the late Mr Denis Aleksandrovich Vyrzhikovskiy. 6.  On 1 October 2010 police officers apprehended the applicant’s son and his friend, Ms Z. and took them to the Moskovskiy District Department of the Interior of St Petersburg (УВД по Московскому району г. Санкт‑Петербурга). No record of their arrest was drawn up. 7.  For approximately six hours the applicant’s son was ill-treated by police officers He was repeatedly punched in the stomach and hit to the head, right palm and both calves. He was also subjected to the so-called “swallow” method of torture (“ласточка”), with his head, hands and legs being pulled together towards the spine. 8.  Two police officers then took the applicant’s son and Ms Z. to another police station. Ms Z. later testified to having seen a bruise on Mr Vyrzhikovskiy’s forehead and to his having been in pain and having had difficulties getting into a police car. 9.  Early in the morning on 2 October 2010 Mr Vyrzhikovskiy was taken from the station to a hospital. He died there eight days later. An autopsy report stated that the cause of death was “a severe fat pulmonary embolism aggravated by bronchopneumonia with cerebral edema resulted from a comminuted humeral head fracture with a tear of joint capsules and massive bruises, suffusion and strain of soft tissue and the subcutaneous fat layer.” A pathologist also found the following ante mortem injuries on Mr Vyrzhikovskiy’s body, all directly linked to his death: massive bruises covering hands, chest, upper back, neck, armpits and most of his face and ears; bruises on the left hip, right palm, right part of the stomach, right thigh, left knee, both calves; abrasions and bruises on the buttocks. All injuries had been inflicted by hard blunt objects. 10.  On 12 October 2010 criminal investigation was initiated. The applicant was granted victim status in the proceedings. Several police officers were charged with manslaughter and abuse of powers entailing a substantial violation of individual rights, committed using violence. 11.  On 26 March 2014 the Moskovskiy District Court of St Petersburg found the officers guilty as charged and sentenced them to various terms of imprisonment. On 1 October 2014 the St Petersburg City Court partially quashed the judgment and acquitted officers of manslaughter for lack of evidence. While having found it established that the injuries had been inflicted on the applicant’s son intentionally in the police custody, the City Court remitted the case for an additional investigation in order to identify those responsible for his death. 12.  On 2 March 2015 the investigation was suspended because the time‑limit for the investigation had expired and it was impossible to identify the perpetrators and to carry out any investigative measures in the absence of an accused. On 12 November 2015 the Oktyabrskiy District Court of St Petersburg upheld that decision as lawful. The decision became final on 27 January 2016.