http://www.cbsnews.com/news/56-members-of-ms-13-gang-charged-in-massachusetts/In all, 56 gang members were indicted on racketeering conspiracy charges, including charges related to murder, conspiracy to commit murder and attempted murder. Some are also charged with drug trafficking, firearm violations, immigration offenses and fraudulent document charges.
I don't know why they aren't designated as a terrorist organization considering some of the things they do. Very violent group. Doubt this drop in the bucket will slow them down but a good start.