From 2001 to 2015, he represented the Russian opposition leader Boris Nemtsov. He has represented the interests of Nemtsov’s daughter Zhanna Nemtsova in the investigation and trial over Nemtsov’s assassination, and has led efforts to establish international oversight over the case. Prokhorov has served on Russia’s Central Election Commission, and is currently a leading figure in the opposition Solidarity movement. He holds degrees in history and law from Moscow State University.