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Sheriffs Ryan Pretti (cq, left) and Gary Halkowitz (cq) with the Pima County Sheriff Department, Green Valley District, walks along a known migrant trail looking for drugs and lost o injured migrants, August 4, 2009. In addition to traffic stops and drug busts, the sheriff department is primarily responsible for responding to dead body calls and body recovery and transfer from the desert to the medical examiners office in Tucson...PHOTOS/ MATT NAGER