A Florida woman is charged with killing her boyfriend by zipping him into a suitcase and refusing to let him out. She says it was an accident. And just outside Washington, D.C., a young mother vanished in July. Her husband was arrested a month later, and prosecutors now say they have evidence connecting her disappearance to his visits to dumpsters across Northern Virginia. He claims she’s still alive. And automotive expert Lauren Fix has tips on how to stay safe on and off the road.

In Florida, the trial of Donna Adelson -- accused of masterminding a hit on her daughter's ex-husband -- is derailed. Hear jailhouse phone calls between her and her convicted son. And in San Francisco, the trial for the man accused of killing the co-founder of Cash App last spring is just around the corner. Plus how to avoid becoming one of the millions who fall victim to fraud.

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.