Sadly, Juana Acosta suffered in real life similar circumstances to the one her character goes trough. Her father was killed when she was 16 and her brother, sister-in-law and their kid were kidnapped, and let go after a while.
At the scene where Vero is looking at the photo of Patricia, she turns it around and sees a stamp from the photo studio where the picture was taken, the "J.C. Gómez Photo Studio". Juan Carlos Gómez is the cinematographer of the movie.