You can include the little border town of Palomas, Mexico on the list.
http://www.lcsun-news.com/ci_9228865?source=most_emailed
Palomas is pretty horrible right now but not much worse than it has been for years, they are just reporting on it now. In 1985 we had a guy who worked for us (legally) but lived in Palomas, there were murders every weekend.
It has always been an unsavory town, the rumor was that the “muy rico” family got it’s money by rolling and murdering tourists and that was in the ‘50s. Their son was being targeted by the Mexican Mafia so he came across the border with drugs and made it obvious so that Customs caught him, he pled guilty, went to prison, got a college degree. The heat was off when he got out and he became mayor.