A Canadian court on Monday found a former leader of a breakaway religious sect guilty of practicing polygamy, after a decades-long attempt to prosecute members of the group, the Canadian Broadcasting Corp said. Winston Blackmore, a former bishop of the breakaway Mormon community of Bountiful in southeastern British Columbia, was found guilty by a British Columbia Supreme Court judge of one count of polygamy. Justice Sheri Ann Donegan had not yet given her finding on Blackmore's co-accused, James Oler, another former leader of the sect, who also faced one count of polygamy.