Mexico City, August 6 (teleSUR-RHC)-- Almost four weeks after the escape of Joaquin “El Chapo” Guzman, the U.S. government released a statement saying it believes the most wanted drug lord is still in Mexico. Guzman is more than likely in Sinaloa state, they say, a suspicion shared by a source with teleSUR immediately after his alleged jailbreak. Chuck Rosenberg, acting head of the Drug Enforcement Agency, told reporters U.S. federal agents are working with Mexican authorities on the recapture of Guzman, who supposedly fled the maximum security Almoloya de Juarez jail through a mile-long tunnel leading directly from his cell to an empty house. Guzman and his closest associate, Ismael “El Mayo” Zambada, run the Sinaloa cartel. They control large swaths of land, from just outside the Sinaloan capital Culiacan all the way up to Badiraguato, the municipality where El Chapo was born. The DEA official criticized the Mexican government, saying it had “institutional problems” that make sharing intelligence gathering very difficult. Rosenberg said the FBI, U.S. Marshals Service and the State Department are involved in the recapture of Guzman. His statement comes the same day the DEA launched a new poster offering a $5-million reward for information that will lead to Guzman's recapture. Mexico has offered close to $4 million.