OTTAWA—As Mounties move forward to outfit officers with body-worn cameras, the parliamentary budget officer estimates it will cost $131 million over five years. A costing note Thursday said the RCMP is expected to purchase 12,500 camera subscriptions for use across the country at 700 detachments. There were calls for officers to wear the technology during global demonstrations last year demanding more police accountability. Prime Minister Justin Trudeau voiced his support for body cameras in June when the RCMP was facing criticism for a video from a bystander showing an officer in Nunavut using a truck door to knock a man over. An investigation by the Ottawa Police Service determined the arrest was lawful. There was also backlash at the time after a separate video showed Athabasca Chipewyan First Nation Chief Allan Adam in a physical confrontation with RCMP officers in Fort McMurray, Alta. RCMP Commissioner Brenda Lucki agreed to outfit …