. >> reporter: commander ryan rutti of el paso county sheriff's department took us to the border to seesthand what could become a key area for his deputies to patrol under sb-4. what is your assessment of the new law? >> these are federal government responsibilities. it's going to deplete our resources, deplete our ability to respond to the local community. it causes distrust in a community such as this. if you're a victim of crime, we want to know. because no matter how you got here, who you are, we want to hold those who committed the crime against you accountable. >> reporter: it makes people fearful in coming forward and talking about being victims of crimes or witnesses to crime if they feel that you might detain them and deport them? >> that's absolutely right. >> reporter: the commander has another concern, too. >> the immigration law is very complicated on the federal side. we do not have training to identify federal documents that allow people to be in this country. we do not have the expertise. we do not have the databases to tell us if somebody is a united states citizen or n