"This type of gang ... generally doesn't operate in Mexico City's main districts. They operate in poorer outlying areas," Benitez noted, saying that by contrast, gangs in the city center are more sophisticated and keep a lid on the violence.
Mexico City sees drug-war-style violence come to the capital →
Raul Benitez, a security expert at the National Autonomous University of Mexico, said the key to catching Yarrington came when authorities traced phone calls he made to his family in Mexico.
Ex-Mexican governor's long flight from justice ends →