By Florencia Trucco, Karina Maciel and Karol Suarez Mexican authorities are investigating the head of the country’s immigration agency, in the wake of last month’s deadly fire in a migrant detention center that killed at least 38 people and left dozens injured. Mexico’s President Andrés Manuel López Obrador confirmed on Wednesday that the Attorney General’s Office is probing Francisco Garduño, commissioner of the National Institute of Migration (INM) in Ciudad Juárez, for the tragedy.