A dentist on trial for poisoning his wife. And detectives' doubts about the case of a Virginia dad accused of conspiring with his au pair.

In Colorado, security video takes center stage at the murder trial of dentist James Craig. In the D.C. suburbs, a dramatic pre-trial hearing in the case of Brendan Banfield, accused of plotting to kill his wife and a stranger with the help of the family au pair. And verdicts for both former MLB player Dan Serafini and Iowa farmer's widow Karina Cooper. Plus, a former secret service agent on a scam involving fake cops.Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

Dennis Murphy reports on the case of a man who disappeared after a duck hunting trip in Florida.

Hey Dateline fans, we’re sharing with you a special preview of the final episode of an all-new season of Dateline: Missing in America. Josh Mankiewicz reports on the disappearance of Sophie Reeder, a 15-year-old girl who left her Fort Lauderdale home in the middle of the night in May 2017 and never returned. Listen to the full episode in the ‘Dateline: Missing in America’ feed – something you hear might unlock a memory that could be the key to finding Sophie. Listen to the episode on Apple: https://apple.co/3IyK5HPListen on Spotify: https://open.spotify.com/episode/55YKqUk9aVFe6h1isX8sVb?si=ffc6706b8d3a4ab0

Andrea Canning speaks to insiders and reports on the verdict in the Sean Combs trial.

In Kentucky, emotions ran high as the jury returned a verdict in the Crystal Rogers murder case a decade after she disappeared. In Iowa, Snapchat messages take center stage at the trial of a woman accused of murdering her husband. Closing arguments in the murder trial of MLB pitcher Dan Serafini and a sentencing date for Sean Diddy Combs. Plus, Josh Mankiewicz tells us what it was like reporting on the missing person’s case of someone he might actually have met. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com Learn more about the Nancy Snow case and Season 4 of Missing in America: https://www.nbcnews.com/dateline/cold-case-spotlight/nancy-snow-mysterious-annapolis-disappearance-rcna178477

Blayne Alexander talks with Josh Mankiewicz about his episode, “Twisted Tale.” In March 2015, Aaron Quinn called the Vallejo Police Department to report that someone had broken into his home, drugged him and kidnapped his girlfriend, Denise Huskins.  The police began searching for the missing woman, but they also seemed suspicious of Aaron's story.  Two days later, Denise resurfaced 400 miles from Vallejo, and described being held against her will, drugged, and assaulted. At a press conference following Denise’s reappearance, Vallejo police accused the couple of faking the story for publicity. It wasn't until months later, after a man was caught following a similar crime, that Aaron and Denise’s story was proven to be true. Blayne and Josh dive into the media frenzy that surrounded the case and explore how Harvard-educated former Marine, Matthew Muller, was ultimately linked to a string of crimes. Josh shares a podcast-exclusive clip from his interview with journalist Henry Lee, and catches Blayne up on how Denise and Aaron are doing today. Have a question for Talking Dateline? DM us @DatelineNBC or leave a voicemail at (212) 413-5252 — your message might be featured in an upcoming episode. Listen to the full episode "Twisted Tale" on Apple: https://apple.co/3GzpvGM Listen to the full episode on Spotify: https://open.spotify.com/episode/2qOSdYhGnwOW5DEYZQ5Cl7

Hey Dateline fans, here’s a special preview of the next episode of Dateline: Missing in America Season 4. Josh Mankiewicz tells the story of 44-year-old Nancy Snow, a Republican National Committee staffer, who vanished after returning home to Maryland from the campaign trail in November 1980. Listen to the full episode in the ‘Dateline: Missing in America’ feed – a detail you hear might jog a memory that could help authorities crack her case. Listen to the episode on Apple: https://apple.co/44yV4JZListen on Spotify: https://open.spotify.com/episode/2Ud3OL2ACeHhMR5UHlh7eV?si=426a04905c6c4c28

An abduction appears to have been a hoax until a similar case pops up. Josh Mankiewicz reports.

In Idaho, Bryan Kohberger faces a judge and the families of the students he murdered as he pleads guilty. In Kentucky, the prosecution calls more than a dozen witnesses in the case of a murdered mom of five. A verdict in Sean Combs's trial and new charges in the Kouri Richins case. Plus, in New Mexico, a new public alert system for the missing.Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

After more than 13 hours of deliberation over three days, the New York jury found Combs not guilty on a RICO conspiracy charge, not guilty on a sex trafficking charge involving Cassie Ventura, and not guilty on a sex trafficking charge involving his ex-girlfriend "Jane," who testified under a pseudonym. He was convicted on two counts of transportation to engage in prostitution, then denied bond while he waits for his sentencing hearing. That hearing is scheduled for October but could move up. The prosecution is arguing he should be sentenced to around four and a half years, while the defense says the federal guidelines for his offenses put him closer to two years.If you want to read NBC's coverage of the trial, check out our newsletter, “Diddy On Trial”: NBCNews.com/Diddy