They'll simply deny it, and claim it was all planted evidence. At this point most of these people wouldn't believe a video of the entire sequence if it painted Brown in a bad light.
I bet they believe the convienence store video was completely manufactured.
For the hard core group, there's not enough evidence in the world that would ever vindicate the officer.
This is how a race of people think who have IQs generally 10-15 points lower than other races.
Honestly. They simply are not intelligent enough to understand simple logic and scientific facts. Hence the reason they are a failing race worldwide.
When they want to 'blame' someone blame God.