"MS-13 does come and go. If law enforcement is up, and they are really being hounded, they will leave the area. If things get comfortable for them, they will come back into an area to make a profit. I see them seeing Denver as a potential destination spot again."
A multi-agency crackdown on the violent Mara Salvatrucha, or MS-13, street gang over the last four years has metro Denver authorities hopeful they have at least temporarily disrupted its operations here, but they warn a porous border is an invitation for gang members to return.