Sante Geronimo Caserio ( September 8 , 1873 - August 16 , 1894 ) was an Italian anarchist that stabbed the French president of the French Third Republic Marie FranÃ ois Sadi Carnot . Sante Geronimo Caserio ( September 8 , 1873 â `` August 16 , 1894 ) was an Italian anarchist and the assassin of Marie FranÃ ois Sadi Carnot , President of the French Third Republic .