A counsellor of the Moscow Krasnoselsky municipal district, Gorinov was detained on 26 April 2022 following a search. The next day, the court sent him to custody in a criminal case for allegedly disseminating deliberately false information about the Armed Forces. The charge stemmed from his statement at a council meeting, where he criticized holding a children's drawing contest while children were dying in the war. On 5 May, the court put a limit on Gorinov’s time for familiarization with the case materials to 6 May, even though he only began reviewing them on 4 May and spent most of 5 May in court. The Moscow Helsinki Group reported that Gorinov was held under inhumane conditions in the pre-trial detention centre: his cell, designed for four people, housed seven, and he was forced to sleep on the concrete floor. On 8 July 2022, Gorinov was sentenced to seven years in a general regime penal colony. In September, it was revealed that the appeal hearing would be held behind closed doors. The presiding judge cited security concerns, noting that the judge who issued the original sentence had received threats. On 19 September, the appeal court reduced Gorinov's sentence by a month. In December 2022, reports surfaced that Gorinov was not receiving medical care at the colony. After the case attracted public attention, he was transferred to a hospital at a neighbouring colony. On 29 June 2023, Gorinov wrote a letter stating that he was being woken up every two hours at night to check for an escape attempt. In October 2023, Gorinov was placed in a pre-trial detention centre due to a new case against him for allegedly justifying terrorism in a conversation with other prisoners at the hospital. He reported regular searches and mail being withheld. He was eventually returned to the colony, where he was forced to shovel snow while suffering from fever. In December 2023, an attorney visiting Gorinov reported that his health was deteriorating severely. He was extremely weak, suffering from active bronchitis, fever, chills, and difficulty to breathe. Despite this, his medication was confiscated, and medical care was limited to body temperature checks. In March 2024, Gorinov revealed in a letter that he was again being deprived of sleep in the colony, under the pretext of being prone to escape. He was also registered as suicidal. On 29 November 2024, Gorinov was sentenced to three years in a strict regime penal colony in the case of public justification of terrorism. The day before, he had been registered as prone to terrorist activity. In December 2024, it was reported that the heating in Gorinov's cell had been turned off, and he was not provided with a blanket. Following public attention, the heating was eventually restored.