Rancher Gary Thrasher says he never sees any Border Patrol agents in the area. That circumstance shouldn’t be a surprise, since Sheriff Larry Deaver has remarked that the officers have been withdrawn from regions considered too dangerous. (See On the Border: Retreat? for details.)
Another notable remark comes from Pew Hispanic Center researcher Jeffrey Passel, ”Once a migrant makes a decision to set forth for the United States, they ultimately get in.”
Of course. There is no punishment for breaking into this country, so foreigners keep trying until they succeed.