A day after Unifor president Jerry Dias announced his sudden retirement, the union revealed it has been investigating the now former president since late January. Canada’s largest private sector union said in a statement Monday that secretary-treasurer Lana Payne was sent a complaint about Dias on Jan. 26 that alleged he engaged in a breach of the union’s constitution. The union representing 315,000 workers has not shared details of the complaint, but said Dias was notified of an independent investigation, which is ongoing, on Jan. 29 and took a medical leave on Feb. 6. He was slated to retire in August, but later notified Unifor’s executive board that he would retire immediately and cited health issues on March 11. His departure was announced Sunday and attributed to unspecified and “ongoing health issues” “After eight and a half years I can proudly say we have built an incredible organization and made …