Was Sandra Bland guilty of "driving while black"?

[Sundae]

I read this and made my own mind up.
I am a rule follower, in general. Maybe if I've had some of the old dizzy water I might be obstreperous, but I'll feel awful after. And NEVER to someone with the power to actually arrest me.

So I figured this lady was trouble.
She should have just STFU and got her warning, and gone on to have a lovely day.

Then I watched the video.
I don't understand American traffic violations. Everyone seems to agree she did something wrong, so fair enough.
But bloody hell. How did this escalate? I'm not even talking about the suicide - awful though that is. But to me, at the start, she was talking in a reasonable tone of voice, at a reasonable volume, not swearing...

On the flip side, it cannot be her skin colour. Really? This policeman doesn't see/ talk to people with black skin every day?

It's all very sad anyway.