Jamesn, your love for all things South American could pay dividends here. Try out for MS-13. They have absolutely no compunction when it comes to taking lives and they're everywhere. Plus, ElG can school you on the accent.

I'd expect initially you'll take one of the white collar jobs; laundering, fraud and so on. Once you've proved your mettle, you can start whacking people for them. You could probably jump the waiting list by hooking MS-13 up with some of those badly dressed Boston Irish I saw in The Departed.