They are linked to the Jalisco New Generation Cartel and Los Cuinis drug trafficking organization
Once minions of Guzmán's Sinaloa Cartel, traffickers of the Jalisco New Generation Cartel have turned on their former masters.
The incident described by the CNDH represents one of the most egregious rights violations by security forces in Mexico's dark decade of drug violence.
Analysts say Jalisco New Generation could try to use him as leverage to win territory or other gains from what has been the country's dominant gang.
Earlier, officials had said they presumed that the kidnappers had taken another "El Chapo" son, Iván Archivaldo Guzmán.
Official sources have confirmed that Iván Archivaldo Guzmán is one of the people abducted by armed men.
A group of six or seven people suspected to be members of Guzmán's Sinaloa Cartel were abducted by eight armed men from an upscale eatery in the heart of the resort early on Monday.
The state prosecutor's office said in a statement that 43-year-old Pedro Tamayo was gunned down by two attackers Wednesday night in the municipality of Tierra Blanca.
English25/06/2016
Police chief killed in Veracruz
The body was found wrapped in black trash bags with the hands tied and signs of torture.
The upsurge in killings has made Acapulco one of Mexico's most violent places, scaring away what international tourism remained.