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
Charlie Hebdo shooting
Charlie Hebdo shooting
Mark Galperin