TEMPE, Ariz.—The test operator in the Uber Technologies Inc. self-driving car that killed an Arizona woman was a felon with a history of traffic citations who wasn’t watching the road before the accident happened, facts that raise new questions about the company’s testing process for autonomous technology.
The accident and its resulting disclosures are a potential setback in the progress of self-driving cars and to Uber, which has grappled with a number of problems including legal woes and clashes among its board and investors...