Mexican federal prosecutors say Francisco Garduño was remiss in not preventing the disaster in Ciudad Juárez last month despite earlier indications of problems at his agency's detention centers.
Three officials from Mexico's immigration agency, two private security guards and the migrant accused of starting the fire, which killed at least 39, face charges of homicide and causing injury.
Migrants say they are facing increased harassment and unabashed cruelty by local, state and federal authorities as permanent residents' general attitudes toward immigrants shift.
Authorities said Wednesday that they're looking into the actions of eight people for possible misconduct at the detention center, where a fire killed 39 men.
At least 39 migrants are dead following a fire Monday in Ciudad Juarez, Mexico, just across the U.S. border. President Andrés Manuel López Obrador says the migrants started the fire out of despair.
