Regardless of the wrong Levandowski may have committed, he is still an extremely talented engineer in a field where a 'space race' of sorts is going on between a handful of heavily monied-up players.
On one hand, I think Waymo has ability to financial ruin Levandowski. On the other hand, no matter how tainted he is by this scandal, there are still 10 other players in this field who would be willing to pay him a huge salary. So he could easily get a multi-million dollar salary from someone else.
I suppose what could happen is that other companies would be unwilling to work with Levandowski because if a new employer of Levandowski's happens to develop technology similar to Waymo's, Waymo could sue the new company and say the new company received Waymo's proprietary information from Levandowski. Even if that didn't happened, Levandowskis presence is enough to prove otherwise. In other words, just the presence of Levandowski in another self-driving car project is huge legal liability. And that may be his downfall.
It is, however, sad to think that this technology could be set back a few years because of Levandowski's actions.