Kirsten Korosec, TechCrunch:

An arbitration panel ruled in December that Levandowski and Lior Ron had engaged in unfair competition and breached their contract with Google when they left the company to start a rival autonomous vehicle company focused on trucking, called Otto.

And:

Ron settled last month with Google for $9.7 million. However, Levandowski, had disputed the ruling.

Wow. In hindsight, that seems a mind-bogglingly poor decision. Levandowski has filed for Chapter 11 bankruptcy.