MS-13 should be treated as an Occupying (Terrorist) Force and fought with Military personal, not Leo's. And when encountered, Shoot To Kill, should be the standard ROE. Ditto for all the 'latino' Gangs (aka: ILLEGALS) and Drug Cartels operating in the USA(1). We find you. We kill you -- the end.
(1) The Posse Comitatus Act doesn't come into play as the 'enemy' aren't US Citizens and the Military wouldn't be doing work of local Law Enforcement, i.e: Civil Arrests
And landmine the borders to PREVENT this scum from coming into our country.