Romney's Bain Capital investors had extensive ties to death squads in El Salvador

Romney founded the private equity firm Bain Capital with investments from Central American elites linked to death squads in El Salvador. Certain investors had extensive ties to the death squads responsible for the vast majority of the tens of thousands of deaths in El Salvador during the 1980s. 

http://www.huffingtonpost.com/2012/08/08/mitt-romney-death-squads-bain_n_1710133.html