Strategically placed on the Mexico–United States border, Ciudad Juárez has long been a center of illegal drug trafficking. The Juárez Cartel's long-standing control over the city's trafficking activities was challenged in 2007 by its former ally the Sinaloa Cartel, leading to an exceptionally bloody turf war. In the period from 2008 to 2012, violence between the two reached unprecedented heights as the city became known as "the most dangerous place on Earth".
Until all drugs are legalized Juarez will always be a main smuggling route and as a result will pretty much always be in turf wars. Any lull in the violence is probably temporary.
Unless one of the cartels becomes part of the government like the CIA has in the US. In which case the drug business in Mexico will become much more civilized.
You last heard a long time ago then--Juarez is much safer these days, though not quite as safe as El Paso.