Ride-hailing app Uber has said it could halt all services in the city of Houston if it enforces a law that would require all its drivers to undergo fingerprint checks.”We have worked hard and taken extraordinary steps to help guide drivers through the current process in Houston,” Uber's Houston manager Sarfraz Maredia told City Council in a letter delivered Wednesday afternoon. “However, a year and a half later, it is clear the regulations are simply not working for the people of this city.”City regulations went into effect in November 2014 that required all drivers to submit to fingerprint background checks.City mayor Sylvester Turner has said, however, that the city is standing its ground to protect Houstonians.”The city's finger print background check found that hundreds of Uber applicants for licenses who had been through had prior criminal histories. For murder, assault and battery, indecent exposure, DWI, prostitution and aggravated robbery,” Turner said during an afternoon news conference.