This, according to the state prosecutor of Quintana Roo, who just ruled that González had nothing to do with her death.
While plenty of reports suggested the apartment belonged to "Niño Verde," Elizabeth Regina Díaz appared as the presumed owner. She just happens to be the wife of his private secretary. As Reforma dryly summarizes,
"The Attorney stated that it was investigated whether Díaz was the "Niño Verde's prestanombres [strawman] strawmen, because this aspect was not part of the investigations."
Here is her picture, via Animal Político. A report from Terra.com strongly hints at human trafficking.