Today, the gang's extreme violence, vast reach and increasing sophistication have made it a top priority at the highest levels of law enforcement and political leadership from Washington to San Salvador.
In recent months, the departments of Justice and Homeland Security have launched a series of initiatives to confront the threat posed by the gang, also known as MS-13, which has between 30,000 and 50,000 members in half a dozen countries, including up to 10,000 members in the U.S., according to federal law enforcement estimates.
The FBI's creation of an MS-13 task force, the first nationwide effort targeting a single street gang, was ordered by Director Robert Mueller after several high-profile murders blamed on MS-13 in the suburbs of Washington. On Tuesday, Homeland Security's Immigration and Customs Enforcement agency for the first time placed an MS-13 member on its most-wanted fugitive list. The Los Angeles gang member is suspected in a string of violent crimes.
In the United States, the gang has spread from California into 33 other states and the District of Columbia. Investigators say members are involved in murder, extortion, drug dealing and witness intimidation.
Now, law enforcement crackdowns in Honduras and El Salvador are helping reverse the flow. MS-13 gang members recruited in those countries are making their way to the U.S. and bolstering the gang's ranks from California to Maryland.
This north-south recycling of gang members has put intense pressure on Mexico, where MS-13 is involved in robbing immigrants and human trafficking, according to officials. "It has to be treated as a regional phenomenon because in Central America the borders are fading," said Magdalena Carral Cuevas, Mexico's top immigration official.