On April 22, HSI Baltimore special agents arrested the following men charged in the indictment: Tidiane Ba, 44; Mamadou Lamine Ba, 51; Abass Baro, 44 and Sakho Oumar, 33, all of Baltimore. The fifth defendant charged in the indictment, Baba Toure, 39, also of Baltimore, is still being sought. The indictment was returned April 18 and unsealed today.