The degree of murder he’s being charged with is Third Degree, which is also voluntary manslaughter. Some folks feel it should have been second, or even first degree murder, but those are harder to prove.
First Degree murder is premeditated, planned out in advance, carefully executed during and after the crime, as in trying to hide or erase evidence. No case here for that.
Second Degree murder is considered a crime of passion, and there has to be provable intent. And while pressing on the victim’s neck for eight full minutes and ignoring warnings that he was choking, and ignoring the victim’s only cries that he couldn’t breathe certainly LOOKS like his killing was intentional, some in a jury might argue otherwise. Intent is very hard to actually prove.
Third Degree murder, or voluntary manslaughter, is a reckless disregard for life that results in death. That is the charge most easily proven here. Nobody disputes that this cop showed a callous and reckless disregard for Mr. Floyd’s life, and that it did result in his death. That is the provable charge, and I would say beyond any reasonable doubt. The video itself is ample proof of that.
As much as we would like to see the rogue cop put away for the rest of his life, the prosecution cannot risk overcharging, or a jury will surely acquit. As it is, if he is convicted of the Third Degree Murder/Voluntary Manslaughter, he faces up to 25 years in prison. A Second Degree Murder conviction could result in double that time.
If justice is served and he is convicted of the obvious, and receives the maximum sentence, he will have 25 years to think about what he did, he will never again be a police officer (he was fired), and he won’t be doing that to anyone else (unless it’s a fellow inmate).
The prosecution has to go with what can be proven, and is most likely to result in a conviction. That’s IF the jury is fair and does the right thing. No guarantee there, either, but I see no other justifiable verdict.