Why our readiness to pass quick judgment after the aged care taser tragedy worries me

Most readers will have heard by now that the poor lady who was tasered in her nursing home in Cooma has died.
Clare Nowland was reported to have been aged 95 and living with dementia. The incident apparently occurred at about 4am. The use of the taser had caused her to fall and suffer a serious head injury.
Commentary has subsequently filled newspaper columns and online news sites such as this one.
We know there is a video of the event. We know that the police officer has been stood down and charged.