Charges have been dropped against a prominent northern Alberta First Nations chief who was the subject of a violent arrest earlier this year.

Video of the RCMP's arrest of Chief Allan Adam shows officer tackling, punching him until bloodied.

Thunberg noted she met with Adam when she travelled to Fort McMurray, Alta., last year.

"It doesn't matter whether there's cameras there or not," said Lori Campbell, director of the Waterloo Indigenous Student Centre.

A nearly 12-minute RCMP dashcam video of Chief Allan Adam's arrest — and the moments leading up to it — was filed as a court exhibit on Thursday.

'During some recent interviews, I shared that I struggled with the definition of systemic racism, while trying to highlight the great work done by the overwhelming majority of our employees.'

He said a transparent and independent investigation must be carried out so Canadians 'get answers.'

WARNING: Disturbing content. A nearly 12-minute RCMP dashcam video -- filed as a court exhibit on Thursday -- shows the violent arrest of Chief Allan Adam of the Athabasca Chipewyan First Nation and the moments leading up to it.