"Disarm these groups that are causing so much harm everywhere," says cardinal Felipe Arizmendi Esquivel after holding a mass in memory of Marcelo Perez, a priest killed in the southern Mexican state of Chiapas. Priest Marcelo Perez, a well-known human rights defender who denounced violence linked to drug trafficking in Mexico, was shot dead in San Cristobal de las Casas on October 20. IMAGES AND SOUNDBITES