GREENFIELD, Mass. — A Massachusetts man has been convicted in the killing of a 95-year-old man and his 77-year-old wife during a home invasion.The Northwestern District Attorney's office says 25-year-old Joshua Hart was found guilty on Friday of two counts of first-degree murder. The verdict was returned on the second day of deliberations by a Franklin Superior Court jury.Hart is charged in the October 2016 killing of 95-year-old Thomas Harty in his home in the town of Orange.