An infamous Sinaloa cartel leader was arrested on Tuesday.
Mexican prosecutors revealed that the cartel launched a struggle for control of the gang following the re-arrest of Joaquin "El Chapo" Guzman.
The suspect's name has been confirmed as Damaso Lopez, known by the nickname El Licenciado. Lopez was long considered Guzman's right-hand man and helped him escape from a Mexican prison in 2001.
Photos were distributed showing soldiers in full battle gear guarding the entrance of an upscale apartment building on a major boulevard in Mexico City, not far from downtown.
Although Mexico City officials say drug cartels do not control territory in Mexico City, they acknowledge that drug lords have sometimes lived in the city and moved drug shipments through the capital.
In the meantime, Guzman is in jail, the Sinaloa Cartel has been controlled by Ismael "El Mayo" Zambada Garcia and Rafael Caro Quintero, two of the most traditional, old-school capos, plus Lopez, and Guzman's son, Ivan Archivaldo Guzman and Jesus Alfredo Guzman Salazar.
Lopez's son, Damaso Lopez Serrano, will likely seek revenge for his father's arrest. The younger Lopez who is known as the mini-licenciado is known to be violent, flashy and undisciplined.