During the 2019 Moscow City Duma election he helped Lyubov Sobol to train signature collectors, and after she went on a hunger strike, joined her. On the night of August 1, the Investigative Committee of Russia came to him with a house-check, and then detained him. On 2 August, on the 20th day of the hunger strike, he was arrested for two months on charges of involvement in the mass riots. Lyubov Sobol considers the arrest of Minyaylo to be a pressure on herself. The charge was brought only in part 2 of article 212 of the Criminal Code (3–8 years imprisonment). Minyailo pleaded not guilty and pointed out that he had been in court together with Sobol (she was detained before the announced rally) for almost the entire day of July 27 and was detained on the way to Trubnaya Square. The leaders of several well-known Russian charitable foundations spoke in support of Minyaylo.