First, running away in handcuffs is just stupid. She could have just as well tripped and fallen and be in the same condition without the Taser. She is the one most at fault for her condition.
However, as there was police involvement in the severe injury of a handcuffed, unarmed prisoner the department needs to make changes to prevent this happening again.
The first change is minimum fitness requirements for all officers. The officer in this case reached for his Taser first because he was not fit for a foot pursuit. Make sure all officers can lift a minimum weight and run sprints and the mile within minimum times with full gear. This poor slob could barely keep his pants up at a jog.
Second, restrict the use of Tasers on handcuffed runners. They are not a threat as long as they are running away and they probably aren’t going to get far. As if the stun of the Taser isn’t bad enough, the handcuffs limit their ability to catch themselves as they fall they are much more likely to suffer severe injury like this girl did. Tasers are not a harmless way of stopping someone, so police need to stop behaving like they are.
A cop who weighs 2X as much as a woman who is already handcuffed loses control of her. That is incompetence.