According to NME, Mumford & Sons got into a little bit of trouble with the U.S. Border Patrol last year. During 2011's iconic "Big Easy Express" tour--which found the folk band along with Edward Sharpe & The Magnetic Zeros and the Old Crow Medicine Show touring through the U.S. on a vintage train--the group was stopped by police in Texas who believed they were using the vehicle to smuggle immigrants over the Mexican border.
Bassist Ted Dwane told The Sunday Times about the incident, explaining "In Marfa, Texas, we were pulled over by police waiting for us with cars across the track. They accused us of stowing people away on the train." Continuing with, "It was edgy, but the gig eventually went ahead. We swelled the town about fivefold and ended up playing soccer with the police."