Yes, I agree, there is certainly the "screw you"-angle in the crowdfunder! Just look at who created it.
Regardless, there is another angle, perhaps unintentionally, and I think it is more important in the big picture:
The officer will likely never work as a policeman again, regardless if he goes to jail or not.
He likely ends up unemployed, and will probably have a hard time finding work for the rest of his life because of the reputation he has obtained.
If the consequences for a police officer following their training -- crime happens, suspect does not comply to verbal commands, suspect needs to be stopped per training, in this case firearms were allowed -- is that the officer's life will be destroyed and also their family will suffer tremendously and ends up losing whole or half their income, what do you think happens next time when police has to uphold the law?
The police will choose to look the other way and let whatever is happening take place. This is very bad for society as a whole in the long term.