Conservative candidates shared a letter on social media, claiming it was given to prison inmates to sway their vote for Mark Carney over Pierre Poilievre. CBC News’s visual investigations team dug in to try and find out what's really going on. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News on TikTok: https://bit.ly/3TnHioe Follow CBC News on Twitter:

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