Valerie Cincinelli’s plot to murder her estranged husband Isaiah Carvalho and the daughter of her boyfriend John DiRubbo, was foiled by an undercover FBI operation. But who turned her in?

Dateline: Secrets Uncovered revisits the Isaiah Carvalho murder-for-hire plot, revealing how ex-NYPD officer Valerie Cincinelli’s scheme unraveled through FBI recordings and a staged crime scene sting ...

Less than two years after saying “I do” on his wedding day, Michael David McKee’s marriage was over. The high-achieving vascular surgeon, who most recently lived in Chicago, had wed Monique Sabaturski ...

As the search for the "Today" host’s mother Nancy continues, the audience shares in her raw and public anguish.