State police have detained and disarmed the entire police force of a town in western Mexico where a mayoral candidate was killed on Thursday. Video of the detention aired by local media showed uniformed officers hitting each other as gunshots go off in the background. The Michoacn state police force said, "All the officers of the Ocampo municipal police force were detained for an internal affairs investigation." The state police department did not directly tie the detentions to the ... killing of Fernando ngeles Jurez, the mayoral candidate for the leftist Democratic Revolution Party. He was killed in Ocampo, Michoacn. ngeles Jurez is just one of at least 18 candidates killed so far in campaigns leading up to the July 1 elections. Just last week, another mayoral candidate was also gunned down in the conflict-ridden rural town of Aguililla in Michoacn. Almost all of the 18 candidates killed across the country so far have been running for local posts in the July 1 elections, which will also decide the presidency, governorships and Congress. Other politicians who were considering a run have been killed before they could even register as candidates. [Mexican security analyst Alejandro] Hope noted, "there has been a breakdown in the management of disputes," largely in rural areas, where turf wars between rival gangs have heated up, even as the government has become overextended and less able to intervene.