Attorney of the state Marco Antonio Higuera Gómez said the bodies found inside the van have not yet been positively identified.
Two migrants were treated for lack of oxygen.
Óscar Alejandro Rivero Matos was arrested along with two men, one of them a municipal police officer.
U.S. Customs and Border Protection said the customs form filed by the traveler from Mexico acknowledged the person was carrying food but had lied when asked if there was any meat.
Arturo Díaz was arrested on October 20 in Mexico City and sent to the Federal Social Rehabilitation Center No.13 in Oaxaca, awaiting extradition.
Angel Eduardo Prado is considered one of the first 15 priority objectives in the state.
The drug lord escaped through a tunnel built into his cell.
The former coordinator of the Federal Centers for Social Rehabilitation and the former director of "El Altiplano" prison were arrested for their alleged involvement in the escape of the drug lord.
Mexico City prosecutor Rodolfo Ríos Garza said Friday that César Omar Martínez had been arrested earlier in the day on the city's south side.
According to the U.S. Immigration and Customs Enforcement (ICE), the operation resulted in 17 arrests in El Salvador, seven in Guatemala and 12 in Mexico.