Elon Musk, the world's richest person, has claimed since 2015 that, for Tesla, technology for self-driving cars is a "solved problem," and made outlandish claims about Autopilot capabilities. But a New York Times investigation reveals the quixotic nature of Musk's pursuit of self-driving technology, and the tragic results. Autopilot has been a factor in several deaths and dozens of other accidents that Tesla has not publicly acknowledged. Some former Tesla employees speak out against Musk for promoting a self-driving program that they believe was perilous.