UN official calls for investigation of Mexican prison riot

A United Nations official has called on Mexico's government to conduct an exhaustive investigation of a prison riot that killed 49 last week.
Special rapporteur for torture Juan Mendez said in statement today that the government must guarantee that the victims' families know what happened during the Thursday riot at the Topo Chico prison in the northern city of Monterrey.
Mendez says the investigation should identify those responsible and include reparations for the victims' relatives.
The UN official toured the prison in 2014. He says he witnessed horrible conditions and lax rules that allowed prisoners to govern themselves and led to violence.

Authorities say two factions of the Zetas drug cartel battled for control during the riot. The prison's director, superintendent and a guard have been arrested on murder charges.