There are calls for a police watchdog to have its powers bolstered after allegations of gratuitous violence and cover-ups.
Scandal-plagued NSW Police is again under fire after an episode of ABC's Four Corners on Monday night aired graphic videos of officers beating people under arrest, including a woman suffering a mental health episode.
NSW Greens MP Sue Higginson said the plethora of evidence did not surprise her, and did not scratch the surface of "a toxic and brutal culture that exists in the police force".
"This is a culture of excessive force, unbridled power and cover up, enabling police to be violent with impunity," she said.
"The default system is for the police to investigate themselves and it's not working."
