It's important to point out that Jordan Edwards was killed in front of his brothers who were also jailed for absolutely no reason. Imagine, as a child, watching your sibling die in front of your eyes, killed by the very people who are sworn to "protect" you. What sort of issues are you going to have throughout life?
Being a police officer can be a tough job. Carrying a gun with license to kill is an awesome responsibility. But you're not supposed to use deadly force unless you are protecting your life or the life of others. Implicit in that calculation is the ability to identify the threat. If you, via explicit or implicit bias, view all human males with dark skin as a deadly threat you shouldn't be a police officer. At the very least you shouldn't have a gun. People do make mistakes. But when your mistakes involve other people's lives then you need to pay dearly. There was a similar case in Louisiana recently where two cops shot into a vehicle, killing a six year old boy. However there were no conservatives snidely questioning the parenting skills of the boy's father. The DA didn't tap dance for months trying to avoid charging the cops. The jury didn't have any problems stretching the concept of reasonable doubt to its breaking point to dodge sending back a guilty verdict. And the judge had no problem throwing the book at the convicted police officer. The cop got forty years in prison with no chance of parole or probation for at least twenty years. Of course there was one little difference between the Texas case and the Louisiana case. The cops in Louisiana were black. The boy and his father were white. I don't think it's wrong to demand that Oliver also get at least forty years in prison.
Ideally these incidents will stop when mostly white police officers have been retrained or restrained to not have automatic hatred and contempt for black males. Or these occurrences will cease when the police fears the community's reaction as much as the community fears the police. There must be either justice or retribution.