Episode 63

After the couple was mysteriously found dead, Trevor Ault has details on officials revealing Gene Hackman died of heart disease and Alzheimer's, while his wife died of hantavirus – a rare disease transmitted by mice; Steve Osunsami has the latest on the South Carolina man, who was convicted for murdering his ex-girlfriend's parents, becoming the first person to be executed by firing squad in 15 years; Pierre Thomas reports on the two active duty soldiers and an Army veteran accused by the FBI of stealing sensitive military and national defense secrets and selling them to China; and more on tonight's broadcast of World News Tonight with David Muir.