Jimmy took advantage of the fact that work had not yet ended, and went straight to Ruiz's office to find him. Neil had just mentioned Haitian voodoo, and considering it's from Haiti, seeking Ruiz for information was the quickest option. There had been data on Haitian gangs in materials he'd seen before, but he had not paid much attention to them at the time, because compared with the gangs from El Salvador, the Haitian ones were significantly less threatening.
MS13 is the gang from El Salvador that spans across Latin America and North America, daring in combat and willing to do anything.
The Haitian gangs weren't nearly as formidable. Due to a decision the United States had made to deport members of Haitian gangs from American prisons back to Haiti, the country had become overrun with hundreds of different gangs, engaging in infighting and robbing civilians.