. >> maureen meyer works for the washington office, she has concerns about what happens when migrants fleeing violent situations are detained. >> the big concern is that a lot of migrants that are leaving, a lot of people leaving central america probably qualify for protection. we are not necessarily talking about the traditional economic single male migrant who comes here to make money and sent home. wsend home. young people who are fleeing gangs, young girls fleeing being turned into prostitution. a lot of cases mexico has been returning people to the dangerous situations they were fleeing from. >> meyers says additional checkpoints and stepped up security have also pushed migrants into different, more dangerous routes to the united states in their efforts to avoid authorities. >> migrants have been victims of horrific crimes in recent years, widespread kidnapping, sexual assault, being sold into slavery. a lot of these situations haven't gone away. in a lot of places they seem to exacerbate it. >> but young people like christian are still coming. he says he was attacked with a knif