Michael Jackson sings about Police Brutality in his song 'They Don't Really Care About Us' from the HIStory album released in 1995.

Here's the official music video
http://www.youtube.com/watch?v=8HSNeHHuQA4

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LYRICS
(not all the lyrics, just some snippets I took out)

In the suite, on the news
Everybody dog food
Bang bang, shot dead
Everybody's gone mad

Beat me, hate me
You can never break me
Will me, thrill me
You can never kill me
Jew me, sue me
Everybody do me
Kick me, kike* me
Don't you black or white me

Tell me what has become of my life
I have a wife and two children who love me
Now I'm the victim of police brutality, no
I'm tired of bein' the victim of hate
You're rapin' me of my pride, oh for God's sake
I look to heaven to fulfill its prophecy...
Set me free

*a 'kike' is used as a very offensive term for a jew or a group of jewish people
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Michael Jackson used his talent to explain and open up what he really felt like inside. He did this through the magic of songwriting.

And one last thing before I click the mother fucking 'Submit New Thread' button. I think they really don't care about us...

I never cared much for Michael Jackson. Nice find but I only like his more famous hits.