Chalino Sánchez was one of the greatest exponents of corrido and narcocorrido. The Sinaloan singer was shot to death more than 30 years ago in Culiacán, Sinaloa.

The stories that have surrounded his life have created a mythical character. The lack of veracity was the first obstacle when we started doing the research, Alejandro Mendoza tells this newspaper. "You tell a story in which many elements are rumors, there is no way to prove it," he says.