Director Estevao Ciavatta speaks before the presentation of a film as former Bogota Security Secretary Hugo Acero, in green shirt, listens in Rio de Janeiro, Brazil, April 25, 2008. Acero, a sociologist, helped reduced crime rates in Bogota drastically during his time as security secretary and the measures are being studied in Rio to combat crime there.(Australfoto/Douglas Engle)

Director Estevao Ciavatta speaks before the presentation of a film as former Bogota Security Secretary Hugo Acero, in green shirt, listens in Rio de Janeiro, Brazil, April 25, 2008. Acero, a sociologist, helped reduced crime rates in Bogota drastically during his time as security secretary and the measures are being studied in Rio to combat crime there.(Australfoto/Douglas Engle)