Immigrants are now more fearful of the law enforcement agency than the gang.
The arrests are part of a two phase crackdown called "Operation Raging Bull."
Angel Ramos, 36, is accused of stabbing a woman in his moving car several times with a flathead screwdriver in northeast Colorado last week.
Attorney General Sessions said he has authorized federal prosecutors to investigate members of the international MS-13 gang with all lawful tools.
FBI had been on a four-year manhunt in search of Gomez before he was captured in Woodbridge, Virginia.
MS-13 is among gangs categorized as the biggest threat to public safety based on relationships with Mexican cartels and high levels of violence and transnational crime.