For the second time in a week, a United Nations human rights official has been barred from visiting a U.S. immigration jail. The official, Jorge Bustamante, is conducting a three-week investigation into how immigrants are treated in the United States. Bustamante had planned on visiting detained immigrants jailed at the Monmouth County Correctional Institution in New Jersey, but he was refused entry. Last week he was blocked from visiting the Hutto facility in Taylor, Texas, where the U.S. is jailing up to 200 immigrant children and their families.