How can you judge the police’s handling of the situation that resulted in the killing of the son as absolutely unjustified based on what was in the article?

To start with, by not judging it in a vacuum.

I commend you for wrestling with the ethics, but be careful what you take for granted. A kid is dead, and a father is likely looking around at how police misconduct has been handled, even before a fascist takeover of our federal government, and concluding that justice is not on offer to him or his kind unless he returns some measure of balance to the scales.

This is wrong, it’s tragic all around, but stuff like this will continue until there is real justice to be had.