National police are well trained in emergencies like typhoons, drug raids, major cases. Local police are better trained in family disputes, petty crime, civil matters. As they know the area they work in. Who is who & such. Local police here still walk a beat 2 hours a day average. Stop & talk to people. Are trusted by people in there area. National police are more out if disaster strikes or solving major crimes. They have non police skills like computer crime, drugs, bank robberies & such that don't stay in a local area.