MEXICO CITY (AFP) — Gunmen assassinated a commander of Mexico City's anti-kidnapping police Friday, the fourth top police authority slain in 10 days here as the toll from a rising organized crime wave hits top brass. One day after acting federal police chief Edgar Millan was brutally murdered, four gunmen in a truck shot and killed anti-kidnapping commander Esteban Robles, authorities said. Robles was rushed to hospital after the attack Friday but did not survive. The violence, believed to be mostly related to the government's stepped up fight against drug trafficking, saw a new grim chapter Thursday in Mexico City...