steve: a frantic manhunt intensifying for the killers of that border patrol agent seen screen left right there also brutally beat his partner. president trump now doubling down on his vow to build that wall on our southern border. our next guest claimed the wall could have prevented this agent from being killed. here to explain is the policy director at the center for immigration studies, jessica vaughn joins us from the boston area. jessica, good morning, first of all. how would. good morning. a border wall have sthafd agent s life? well, in that area, there is some fencing, but there is not much of it. and parts of the border are wide open. and there are pecan fields and cotton fields on that side. i have traveled to that area fairly recently, and the wall works to not only slow down the cartels that are running the drug trafficking mainly but also people trafficking. keeps them from easily getting over the border itself. you can jump over the river there pretty much.