Inside the abandoned ranch's gates were an increasing number of horrors, including hundreds of pairs of shoes, even children’s toys

For families in Mexico searching for missing loved ones, the grim discovery of what is being called an "extermination" site with human remains and ovens, could be their worst fears some true. 

Mexican authorities are now investigating the site in the western state of Jalisco, first found last week by a group of volunteers that was believed, by the volunteers, to have been used by one of the area's cartels known as the New Generation Jalisco Cartel. 

Inside its iron gates were an increasing number of horrors, including cremation ovens, bone fragments, hundreds of pairs of shoes, clothing and even children’s toys. 

Nemesio Rubén Oseguera Cervantes (Latin American Spanish: [neˈmesio oseˈɣeɾa seɾˈβantes]; born 17 July 1966), commonly referred to by his alias El Mencho ([el ˈmentʃo]), is a Mexican drug lord and top leader of the Jalisco New Generation Cartel (CJNG), an organized crime group based in Jalisco. He is the most wanted person in Mexico and one of the most wanted in the U.S. The US government and the Mexican government are offering rewards of US$15 million and MXN$300 million, respectively, for information leading to his arrest.