And Robert Dziekanski's murder by RCMP would never have been known except for the young man Paul Pritchard's video.RCMP initially took possession of the memory card containing the video as evidence, stating it would compromise the investigation if it were released to https://twitter.com/critcrim/status/1384709237100531712

the public at that time. Pritchard demanded the RCMP return the video so that he could release it to the public.

When the police refused, saying releasing the video would compromise their investigation, Pritchard hired a lawyer, held a news conference 2

and threatened to use legal action to get it back.
https://www.cbc.ca/news/canada/british-columbia/man-who-shot-dziekanski-video-gets-journalism-award-1.823596

Darnella Frazier, 17, took the video of Chauvin mudering George Floyd. 3

When videos of controversial police encounters generate headlines, there's an important figure in the story that we rarely hear about - the person filming. 4 https://www.bbc.com/news/world-us-canada-52942519