In January 2015, Galperin was sentenced to 38 days in jail for taking part in the street protests. During the first protest, which took place on January 10, 2015 after Charlie Hebdo shooting, he was holding up a "Je Suis Charlie" sign near the Kremlin walls, expressing solidarity with French cartoonists murdered by Islamist terrorists in Paris. A week later, he was detained during a rally in support of opposition leader Aleksei Navalny.