Tanvir Mahmud, 55, managing director of Hallmark Group and a key figure in one of Bangladesh’s largest financial scandals, died Saturday night while undergoing treatment at Dhaka Medical College Hospital. Prison authorities said he was transferred from jail earlier in the day after complaining of illness. Mahmud had long suffered from kidney disease, hypertension, diabetes, and respiratory complications. He was serving a life sentence handed down last year for embezzling Tk 10 crore under the names of non-existent companies. The Hallmark Group became infamous after being accused in 2012 of misappropriating around Tk 4,000 crore in loans from Sonali Bank through fraudulent means. Mahmud’s wife, Hallmark chairperson Jesmin Islam, and several others were also convicted in the case. His death marks the end of a controversial chapter in Bangladesh’s banking and corporate fraud history.