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

'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.'

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.