"There are abuses by soldiers, but there often isn't this kind of solid proof," he said. "They are not accustomed to acknowledging such cases, unless the evidence is overwhelming."
Mexican soldiers face charges for apparent torture of woman →
Raul Benitez, a security expert at Mexico's National Autonomous University, said Guzman's second escape is even worse for Pena Nieto than if he had never captured him.
Escape by Joaquin Guzman, top drug lord, a strong blow to Mexico's government →