To support your point, I don't believe for a second that Uber is actually innocent of intentionally stealing trade secrets. Far more likely that they they had the foresight not to keep any documents of their foray into industrial espionage, knowing that getting caught if there simply isn't any trail is very unlikely.

(I mean, this is the company that remotely wipes machines to avoid complying with search warrants, under a CEO that appears to think that the ends justify any means...)