NBC News' Dennis Murphy speaks to a Georgia father accused of murdering his ex-wife. While his friends come together to prove he is innocent, prosecutors count on his young children to testify against their own father.

Police are puzzled when a woman vanishes without a trace from inside her home in Washington, D.C. Adding to the mystery is that her security cameras don't show her leaving. As investigators begin to search for answers, they discover a connection to a decades-long disappearance of another woman.