Except when you tell people that tasers are safe so idiots like this cop think tasing someone for a no reason is a good idea.
Tasers are safe, and police have them because they are a safer more efficient alternative to physically subduing someone--especially when they are drunk or on drugs.
In
extremely rare instances, people die
due to underlaying medical conditions (usually associated with the heart) and/or due to the drugs in their system. People have died after being maced in the face.
People have died after being placed in handcuffs after over exerting themselves while physically resisting officers. These deaths occur because the person had some sort of unbeknownst medical condition. Police officers do not have ESP, and are incapable of determining if the person they're dealing with is A) on drugs, B) has a heart condition, or C) has any other medical condition that might become aggravated due to being tased/maced.
As for the four links you provided, they say nothing about an autopsy report or cause of death.
No it's not. Cops can only use a gun when they think that a suspect is going for a gun themselves.
A gun has nothing to do with it. If the officers feels their life (or that of a fellow police officer, citizen ect) is in immediate danger of severe injury or death, deadly force can be used.
Not when they don't follow order,
Not true. If the cop feels they are in jeopardy for their life or another, deadly force can be used. This means that if police officers are telling you to "get on the ground" and "do not move", and you instead reach into your waist band, you can be shot.
Not true. For instance, if a 250 pound man is hitting and struggling (even if he is unarmed) with a 150 pound female police officer, deadly force
can be used. That's just an example, there just needs to be a reasonable expectation within the mind of the officer that they will suffer severe bodily injury or death unless deadly force is used.
Again, not true. If the officer has reason to believe(and is going to make an arrest) that you have just committed a forcible felony(a carjacking, murder, robbery, ect) and you are attempting to flee, you
can be shot. All that needs to be shown legally is that in the officers state of mind, he had probably cause to believe you were a severe and immediate risk to the community.
This is summed up marvelously by the very famous
Tennessee vs Garner case by the supreme court, which outlined the exception as "such force [meaning deadly force] may not be used
unless necessary to prevent the escape and the officer has probable cause to believe that the suspect poses a significant threat of death or serious physical injury to the officer or others."