Taser International, the stun-gun maker emerging as a leading supplier of body cameras for police, has cultivated financial ties to police chiefs whose departments have bought the recording devices. Taser is covering airfare and hotel stays for police chiefs who speak at promotional conferences. It is also hiring recently retired chiefs as consultants, sometimes just months after their cities signed contracts with Taser. The relationships raise questions of whether chiefs are acting in the best interests of the taxpayers in their dealings with Scottsdale, Arizona-based Taser, whose contracts for cameras and storage systems for the video can run into the millions of dollars. As the police chief in Fort Worth, Texas, successfully pushed for the signing of a major contract with Taser before a company quarterly sales deadline, he wrote a Taser representative in an email, Someone should give me a raise." City officials and rival companies are raising concerns about police chiefs' ties to Taser. Charlie Luke, a Salt Lake City councilman ... said he was surprised when he learned last year that the city's police department had purchased Taser cameras using surplus money, bypassing the standard bidding process and City Council approval. The department declined to say how much it has spent acquiring 295 body cameras. Taser's competitors ... complain they have been shut out by cities awarding no-bid contracts to Taser and are being put at a disadvantage by requests for proposals that appear tailored to Taser's products.