A Homeland Security department IG report looks at implementation of a new immigration law . The study finds that many people get in the country , by land , without required permits . `` In the event that a traveler does not possess a ( passport or other authorized document ) , the inspecting officer will use all available documentary and system information , as well as oral questioning and inspection techniques , to establish identity and citizenship . '' Compliance rates are much higher along the Canadian border than the Mexican border . The border patrol agency says its built - in compliance program is working .
A Homeland Security department IG report looks at implementation of a new immigration law . The study finds that many people get in the country , by land , without required permits . Compliance rates are much higher along the Canadian border than the Mexican border . The border patrol agency says its built - in compliance program is working .