Sean Combs arrested and held. A husband charged with a double murder. And innocent men in a maximum security prison.

The music legend once known as Puffy, Puff Daddy and Diddy was arraigned in open court this week. NBC News correspondent Chloe Melas was there. And in a northern Virginia suburb, did a man kill his wife and a stranger so he could be with their au pair? Plus, talking to longtime Dateline producer Dan Slepian about his book, "The Sing Sing Files", chronicling his decades uncovering wrongful convictions.