Bailando con tu sombra by Vìctor Heredia.

Víctor Heredia is one of the best Latin American Songwriting of the world. opposition to the dictatorship created songs full of poetry. One is "Bailando con tu sombra"( Alelí), I love its melody and beautiful lyrics, inspired by a true story.
 Víctor goes to prison and decides to visit and give a recital at the most dangerous prisoners and in one of those cells through which it passes, a guard tells him that the man who is there went crazy and I danced all night and just cried. 
Victor asks, and why is he  in prison? ... For killing his wife ... 
Then asked to please let him speak to the prisoner about ... When she asks for crying and who danced ... and the prisoner replied: "I'm here is that within me who killed to dream, to the one who loved me and she always told me that no one can love me like her to me ... 
It was a rainy afternoon when I killed her, but she comes every night to my cell, it's like a shadow with which I dance till dawn, called Alelí, poor me for not having her.