Legal news Roundup - May 31, 2012Compiled By Katia Caporiccio CanadaAlberta to launch $10-billion lawsuit against tobacco companies, The Globe and Mail Supplier suing Bixi proposes mediation, Montreal GazetteBride's dad cleared in altercation with Windsor cop, Windsor Star United StatesRetired justice says campaign finance ruling made cash king, ReutersDewey & LaBoeuf bracing for court battle in bankruptcy, ReutersInternationalFrench appeals court lifts gagging order on former IMF chief, ReutersEcuador plaintiffs file Canadian lawsuit against Chevron for polluting Amazon, Reuters