ORLANDO, Fla. - Relatives of a missing boy's mother who killed herself after aggressive questioning by CNN's Nancy Grace sued the network and the talk-show host Tuesday, claiming Grace caused emotional distress that led to the suicide. Melinda Duckett committed suicide Sept. 8, a day after Grace's show on CNN Headline News aired a segment in which Grace grilled Duckett about her whereabouts Aug. 27 — the day 2-year-old Trenton Duckett was reported missing. Authorities, who said last week they believe the boy is alive, have named Melinda Duckett as the prime suspect in his disappearance. Jay Paul Deratany, the...