Source?
Hundreds of disengagements, all in a few days in October 2016.
Consistent with multiple attempts of filming their self driving promo.
No disengagements apart from that in 2 years.
https://www.dmv.ca.gov/portal/wcm/connect/f1873c87-4f21-4beb...
Most of these $TSLAQ people are, of course, short-sellers, so take it with a fair bit of salt.
While I haven't heard anything about the DoJ related to the self-driving feature, how they might be involved is pretty obvious:
The DoJ prosecutes federal crimes, including, reportedly, a recent criminal referral from the SEC.
While the trigger for that was Musk's tweets, federal criminal investigations aren't narrowly restricted to the conduct which triggered them; Tesla has made representations, regarding the self-driving feature to investors as well as consumers; to the extent those representations did not fully accurately represent Tesla’s knowledge, and materially impacts Telsa’s expected costs and outlook, that's a potentially criminal securities fraud.