Well, they might have shot a net over her, or sprayed her with foam to immobilize her, or they might have tear gassed her to the ground, or they ... there are non-lethal weapons available, but the police at the scene have to judge whether they need to use more force.
its not like they were waiting for her to charge them. Alright boys get out the net!!
a taser wouldn’t stop her. Remember Rodney King got hit w/ 2 tasers and then beat off 6 cops breaking the ones’ arm ... BEFORE the camera started rolling