Uber has been fined by a Colorado regulator on Monday for nearly $9 million, after an investigation revealed that 57 people with criminal and motor vehicle offenses were allowed to drive with the ride-hailing company. Jalopnik reports: States across the U.S. have been considering laws to require additional background checks for individuals who drive for Uber and competitors like Lyft. In Colorado, the state's Public Utilities Commission investigated the company's drivers after an incident this past March, reported The Denver Post, when a driver dragged a passenger out of a car and kicked them in the face. The commission said it found 57 drivers had issues that should've disqualified them from driving for Uber, including felony convictions for driving under the influence and reckless driving, while others had revoked, suspended or canceled licenses. A similar investigation was conducted on Lyft, the Post reported, but no violations were revealed. An Uber spokesperson said the situation stems from a "process error" that was "inconsistent with Colorado's ridesharing regulations." The spokesperson said Uber "proactively notified" the commission. "This error affected a small number of drivers and we immediately took corrective action," the company said in a statement to the Post. "Per Uber safety policies and Colorado state regulations, drivers with access to the Uber app must undergo a nationally accredited third-party background screening. We will continue to work closely with the CPUC to enable access to safe, reliable transportation options for all Coloradans."