“Many, many years ago, they were very unsophisticated. They weren't very long. They were relatively short,” Vigil said. The first so-called narco tunnel was built in 1989, by the Sinaloa cartel of Joaquín "El Chapo" Guzmán.
A tool is seen in a tunnel under the US-Mexico border that started in Tecate and ran into Southern California, December 4, 2007. Gunmen killed the police chief of Tecate, a Mexican city bordering California, by shooting him some 50 times in an apparent revenge attack after police found the drug-smuggling tunnel under the border.