Dozens of people held a demonstration in this violence-plagued Mexican border city to demand justice for slain rights activist Marisela Escobedo.

On the one-year anniversary of her death, the protesters on Friday walked a route that Escobedo had covered while seeking justice for the August 2008 murder of her 16-year-old daughter.

Coinciding with the march, the Attorney General’s Office in Chihuahua state, whose largest city is Ciudad Juarez, revealed the identity of the main suspect in the slaying of Escobedo but said the man had been killed in September.

Carlos Gonzalez, spokesman for the state AG’s office, said Friday the evidence shows that Hector Miguel Flores Moran killed Escobedo on Dec. 16, 2010, and that the same murder weapon was also used to kill a dozen other people in Chihuahua city between April and August of this year.