A traffic stop that began with a DUI arrest led officers to recover a firearm and ammunition after a follow-up search warrant was served in Coalinga, authorities said. According to the Coalinga Police Department, officers stopped a blue 2010 Honda on Tuesday for a vehicle code violation and arrested the driver, Rigoberto Perez, on suspicion of driving under the influence of alcohol. During a search of the vehicle, officers found 19 rounds of uns…