Just before 7:30 one Friday morning last March, Alejandro said goodbye to his wife Maria and his two small daughters and headed off to work. He didn’t make it far. Four blocks from his home near Bakersfield, Calif., two unmarked vehicles, a white Honda and a green Mazda pickup truck, pulled up behind him at a stop sign. Plain-clothes Immigration and Customs Enforcement (ICE) agents spilled out. ..