Tasers, far too often, are a tool of abuse

The same old story. Some police force decides to purchase tasers, they all get trained and certified, and then the electro-torture and abuse of citizens starts.

Example [LINK]
Example [LINK]
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So what is the root cause?

Does the taser electric shock, often applied to the police trainees during the taser training (always to the back where there's much less chance of cardiac death) - does it run up their spinal columns and cause brain damage? Many trained and certified officers are emerging from their taser training all "Taser Certified", but actually they've become walking-talking human rights nightmares. Something is going wrong.

This all-too-common sequence (tasers -> abuse) leads to some perfectly reasonable questions about the training.

Judged by the real-world results - Taser training is clearly defective.