A nationally recognized anti-gang activist has been arrested on federal racketeering and conspiracy charges for his alleged gang involvement. Alex Sanchez was the director of the gang-intervention nonprofit Homies Unidos. Sanchez, along with two dozen others indicted, is believed to be an associate of the street gang Mara Salvatrucha. How difficult is it for former gang members to advocate gang prevention without being pulled back to a life of crime? David Lazarus explores the issue.

Frank Stolze, KPCC reporter

Alan Diamante, Immigration Attorney for Alex Sanchez

Tony Rafael, author of "The Mexican Mafia" (Encounter Books)