The assassination of a top Paraguayan prosecutor while on vacation in Colombia last week has raised major concerns about the strength and influence of organized criminal groups in the country, one of the world’s top marijuana producers and a key transit point for Andean cocaine. Marcelo Pecci, an organized crime specialist, was shot dead on May 10 on the island of Baru, south of the Colombian city of Cartagena. Pecci was on honeymoon with his pregnant wife when two assailants arrived on jet skis and gunned him down. He died on the spot from three wounds to his face and torso. […]