http://www.rawstory.com/rs/2013/08/08/officer-from-maricopa-county-sherriff-joe-arpaios-jail-shot-dead-in-own-driveway/

Police officers using dogs quickly mounted a two-hour search of the residential neighborhood after the shooting of the officer, who authorities said had been wearing clothing with a sheriff’s office insignia on it. There was no immediate word on motive.
8 years under the cheif racist in charge wouldn't be surprise if it were not personal, i know thats harsh but so is that county on all non Whites, the sheriff has been in the media countless times, last time he was investigating Pres. birth cert.
Witnesses reported several shots fired at about 4 a.m. local time and spotted a man fleeing the scene on foot, police said. Television footage from the scene showed a pick-up truck in the driveway with its hood up and the driver’s door open.When authorities responded to the scene, they found the officer severely wounded in front of the home. He was later pronounced dead at a local hospital. His identity was not immediately released.Sheriff’s spokesman Chris Hegstrom said the officer had worked for the Maricopa County Sheriff’s Office for eight years and was assigned to the custody support bureau but could not be more specific. The Arizona Republic reported that he worked in the jail system’s food factory.Maricopa County Sheriff Joe Arpaio has been a lightning rod for controversy over his aggressive enforcement of immigration laws. The six-term sheriff has been the subject of several investigations and lawsuits stemming from his get-tough policies.
he was a kitchen officer, that could be a reason for revenge, 4am that's a time that usually a little curious what was he doing out there at 4am, was the guy waiting or was he with the deputy? wonder how much we'll hear or will it be covered up, not like their isn't a history there.