Speaking to the ABC, Beverly Baker said "There really does need to be a lot more understanding of the way dementia works."
Ms Baker said she was shocked a taser was used against an elderly and frail woman.
"Words fail me. I think the police need better training on the use of tasers and more emphasis on the history of the person," Ms Baker said. "There really does need to be a lot more understanding of the way dementia works."
"What are the triggers, what are the things that can be used to walk people back — a more gentle, a more generous approach to people having an episode."
At the time of writing the Law Enforcement Conduct Commission (LECC) is also conducting a critical incident review.
A LECC spokesman said the commission was independently monitoring the investigation under Part 8 of the Law Enforcement Conduct Commission Act 2016 to ensure "public confidence in the investigation".