Culiacan, Sinaloa.Mexico.July 6, 2008..Dozens of armed State policeman, along with the Mexican military, patrol the city streets in a show of force in Culiacan. They set up road-blocks and travel through the poorer burrios. From January 1 to mid-July 2008 there have been 535 drug related killings in Sinolao, many of them were police officers...At one point they surround a house with gunmen as they had a tip that there were drugs in a private home..