Aug 28 (Reuters) - A sheriff's deputy pumping gas into his patrol car was shot and killed on Friday in an ambush at a Houston gas station, authorities said. Scene from #officer involved #shooting in northwest Harris County. http://t.co/At5rTowRIo #breaking #hounews #abc13 pic.twitter.com/NpTJtx0joh— Houston News (@abc13houston) August 29, 2015 A search was under way for the officer's killer, who was described as a male dressed in a white t-shirt, driving a red truck, the Harris County Sheriff's office said.