Inmates are seen inside the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. The director of a prison in northeast Mexico where 49 people died in a riot this week was accused of murder and detained, along with two others, a state prosecutor said on Saturday. (Photo by Daniel Becerril/Reuters)





An inmate with a tattoo of Santa Muerte (The Saint of Death) reacts in the Topo Chico prison, during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates are seen inside the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates, outside their cells, are seen reflected in mirrors at the Topo Chico prison during a media tour in Monterrey February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates speak on phones at the Topo Chico prison during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates talk inside their cell in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates are seen inside in the Topo Chico prison in Monterrey during a media tour, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates are seen in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





A police officer stands guard next to a female inmate in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





A female inmate is seen inside her cell in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Female inmates are seen outside their cells in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





A inmate walks holding a table in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Windows burned in a riot are seen in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Family members visit inmates in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





A woman embraces her relative who is an inmate as she visits him in the Topo Chico prison, during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Clothes of female inmates hang against a wall inside in the Topo Chico prison, during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates are seen in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates are seen in the Topo Chico prison during a media tour in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





A female inmate hangs clothes in the Topo Chico prison, during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Inmates gesture gang signs in the Topo Chico prison, during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





An inmate with a tattoo of Santa Muerte (The Saint of Death) looks on in the Topo Chico prison, during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





An inmate sells cigarettes in the Topo Chico prison, during a media tour, in Monterrey, Mexico, February 17, 2016. (Photo by Daniel Becerril/Reuters)





Television sets, images of the Saint of Death and other things are piled up in the patio after a riot at the Topo Chico prison in Monterrey, Mexico February 13, 2016. (Photo by Reuters/State Government of Nuevo Leon)





Inmates cleaning a cell after a riot at the Topo Chico prison in Monterrey, Mexico February 13, 2016. (Photo by Reuters/State Government of Nuevo Leon)