Find out how a headline-grabbing plant theft in Toronto’s Chinatown changed Canada’s citizen’s arrest laws. When David Chen detained a thief at the Lucky Moose Food Market in Chinatown, the Toronto shopkeeper did not expect to be the one arrested. In May 2009, Chen performed a citizen’s arrest on a brazen thief who had repeatedly stolen plants from local shops. To David’s great surprise, he was the one arrested when police arrived — not the shoplifter. David and his colleagues faced serious charges, but they not only challenged those charges in court, they engaged Parliament to challenge the way Canada’s citizen’s arrest laws were written.