Im replying to your thread by starting this one because replies dont work in law enforcement forum. MS13 is becoming a rather large problem in the EAST coast as it is in the WEST coast. I've taken several seminars on GANGS and MS13 is a hot topic. National Geagraphic Explorer has been airing a really good documentary on ms13 called the worlds most dangerous gang.
Next episode airs April 10th at 5pm and 7pm, on National Geographic channel. I found this to be more informative than the seminars i've taken. Hope this helps! Be safe.