Until recently an opposition activist himself, Petrovich publishes corroborating documentation, accuses several leading opposition activists of taking American money, and is interviewed on the issue by Russian newspaper Moskovsky Komsomolets.
Como activista opositor hasta hace poco, Petrovich publica documentación probatoria, acusa a varios líderes activistas de oposición de tomar dinero estadounidense y es entrevistado sobre el asunto por el diario ruso Moskovsky Komsomolets.