Out of all the people listed in the two articles linked above, only Walter Scott's killer has even a chance of doing any time. And, uh, given that that occurred in South Carolina, don't be too surprised if it turns out the prosecutor pulled a Florida and threw a charge at Michael Slagel that a jury won't convict him on. Look at Casey Anthony, or George Zimmerman. Don't be too surprised if the Slagel case whiffs on the murder charge, and instead settles for attempting to plant evidence.
Even if Slagel is convicted of something, he's in the (pardon the dismal, unintentional pun) minority. The cop that killed Eric Garner won't be charged or convicted, nor the cop that killed Tamir Rice. John Crawford's killer, and on and on. They all get away with it. I'm not sure what exactly people think would come from "cop cams" and such. Clearly people have decided to look at this brutal shit, over and over again, and shrug and say, "What else ya got?"
At least the video prevents Slagel from lying about how and why he shot Scott, shows what his bullshit story would have been. But then it goes into the hands of people who may be inclined to give Slagel the benefit of the doubt, to decide that Scott's half-assed excuse for a record mitigates the murder charge.
On the other hand, if you're white, you can fight with cops, and merely get subdued, rather than killed. Strange how that works.