Boston police have captured Lemarcus Smith a Mississippi man who is wanted in connection with a murder in Canada.Police and federal marshals arrested Lenworth A. Spence, 27, of Jackson, Miss., on Tuesday after developing information that he was in the Hyde Park section of the city.Police said he was located sitting in a car, and arrested on an outstanding U.S. federal warrant. The warrant charges Spence, who also goes by the name Lemarcus Smith, with being a fugitive from Canada for murder, conspiracy to commit murder, kidnapping, and conspiracy to commit indictable offense.He was handed over the federal authorities.According to the Toronto Star, Spence is wanted in connection to the March 2007 execution-style Killing