HAYWARD, WI (KDAL) - A judge sentenced the convicted killer of 93 year old Irena Roszak in 2009 to life in prison.  Christopher Roalson of Radisson, Wisconsin was found guilty of the murder in September.  Prosecutors say that Roszak was stabbed to death during a robbery of her home in Sawyer County.   Roalson will spend the rest of his life in prison without the possiblity of parole.