Nope. Do you have any idea how difficult it is to beat even a DUI arrest? Unless you have pretty deep pockets to hire an attorney to contest the breathalyzer, it can't be done. That's because the Judge knows the probability of guilt is overwhelming.
Cops are allowed to rely on their judgment. Which is why I give them my utmost respect and have taught my children to do the same. If cops do something "wrong", such as use of excessive force, it better be captured on video.
This case involves a justified shooting just as Michael Brown's was justified.
Maybe it is a Canadian thing but a DUI is a relatively easy charge to beat.
The rest of your post I am not going to comment on. We are getting waaaay off topic now and everyone seems to be putting words in my mouth.