It would appear that the prosecutor was guilty, at the least, of attempting to manipulate the evidence to show that what transpired was, in his possibly political opinion, worthy of more scrutiny.
A pair of animals known to attack humans, with their owner standing placidly by, would be properly shot, or warned with a firearm. To have the owner then, as the judge noted, "run" towards the man, shouting death threats, is going to create a tense situation. The animals were also still present and active, as well.
There was no note of the physical sizes involved between the men, but an age disparity of better than 14 years existed, with the attacker the younger. Coupled with a history of mental health problems, which explained the irrational behavior after the fact, the man was asking to be shot.
Can anyone imagine the outcome if the younger man had attacked the older one, and the dogs joined in? There was no way that he would have escaped serious, and life-threatening, injuries. The near certainty of the animals joining in the attack goes a long ways towards explaining the lack of "avoidance" in the response.
The prosecutor should be reprimanded for failing to take into account the mental health history of the attacker. His violence is easily understood in that context, but this wouldn't have been apparent to the older man at the time of the attack.