Police Fiction 22 Law enforcement 11 History 10 Special weapons and tactics units 10 Terrorism 8 Police administration 7 Police regulations 6 Prevention 6 Equipment and supplies 5 Biography 4 Fictitious character 4 Juvenile literature 4 United States 4 English fiction 3 Investigation 3 Legil status, law, etc 3 Malaysia 3 Murder 3 Public relations 3 Serial murder investigation 3 Thesis 3 Addresses, essays, lectures 2 Case studies 2 Citizen participation 2 Community policing 2 Complaints against 2 Crime prevention 2 Criminal investigation 2 Criminal justice, Administration of 2