what i say, i going to kill your family in honduras or el salvador or mexico. >> on each of the main streets of houston, the cantina business starts booming around 10:00 p.m. >> let me go to here. >> and can sometimes stretch until dawn. >> see this one right here? they open until 5:00 in the morning. they have rooms here in back. look at this. >> along one of these strips jose brings us to what seems like an abandoned building. >> see that in front? >> there are no signs indicating a business, no music, and it is completely dark. >> you see how many cars? you don't see no lights, right? >> jose warns us to be discreet with our filming. >> it's very dangerous, this place. they have more than 60 women in there, from 14 up. >> months earlier on our initial investigation of cantinas, an armed guard chased our crews away waving his gun.