Hopefully under somebody who doesn't constantly reinforce a victim mentality in minority groups which does nothing to actually help fix the problem but only makes it worse.
From all the Twitter evidence, I support Google's decision here.
Are they legally required to hire a independent research? They are doing this for PR, so I expect their guy to say positive things (like, hey!, Google fixed things).
There are circumstances where companies are required to hire people who could reveal bad things (ie: certified accounting auditors). But to hire someone outside of the legal requirements means they are a propaganda machine for the company. That's fair, if it's important, it's the government who should step up.
From all the Twitter evidence, I support Google's decision here.