Charlie Miller, a hacker who's made headlines for hacking cars like a Jeep, has left Chinese ride-hailing giant Didi Chuxing after less than five months. Miller worked at the company's new research center in Silicon Valley, which focuses on artificial intelligence, security, and autonomous driving.
Why it matters: Prior to Didi Chuxing, Miller spent a year-and-a-half at Uber. His quick departure from now two ride-hailing companies raises questions about why he's not sticking around longer.
The story has been updated with the name of GM's self-driving car unit.