Openings in the Florida murder trial of Ashley Benefield, who married her husband 13 days after meeting him. She's accused of shooting him to death four years later. In Massachusetts, protestors take to the streets again -- this time for a woman whose family says was groomed and exploited by multiple local police officers. And a criminal defense attorney with some tips.

More on Sandra Birchmore's case at NBC Boston and The Boston Globe

A Florida woman charged with second-degree murder claims self-defense in what some are calling The Black Swan Murder Trial. In Atlanta, the judge who'd been presiding over what's already the longest-running criminal trial in Georgia history -- Young Thug's -- has been replaced. Plus, a former Secret Service agent on what to consider before you get in a stranger's car.

Read more of Meghann Cuniff's coverage of Young Thug's trial on her Substack.

A Santa Fe jury hears opening statements in the actor's trial for the 2021 on-set shooting death of cinematographer Halyna Hutchins. NBC News correspondent Chloe Melas tells us how the judge is taking control in the courtroom. In Wayne County, Michigan, a 29-year-old man is facing life in prison for a murder that someone else confessed to. And did you know that, according to the DOJ, as many as 600,000 individuals are reported missing to law enforcement every year?

A hung jury led a judge to declare a mistrial for Karen Read, but news keeps coming out. Dateline producer Sue Simpson is back with news about the lead investigator and the lead blogger. In New Mexico the Hollywood actor's trial, on an involuntary manslaughter charge for an on-set shooting, starts next week. NBC News correspondent Chloe Melas tells us what to look out for. And if travel is on your summer itinerary, advice from a former Secret Service agent can help keep you safe.

Hundreds of people in pink shirts are on verdict watch in Dedham, Mass., where a jury is considering three charges against the woman accused of killing her police officer boyfriend with her SUV. In Arizona parents are demanding answers after a 16-year-old was beaten to death. They fear a gang of teenagers who call themselves the Gilbert Goons. And in Michigan, an ex-boyfriend calls 911 on himself. "I may have murdered my girlfriend and I don't remember it." He later retracts but video of his interaction with cops is a boon for the total stranger on trial the murder.

Outside Boston, the lead investigator might be an asset for the defense. His texts about Karen Read present a real obstacle for the prosecution's case. No physical evidence of actual murder? No problem. Why a judge says Dee Ann Warner's husband should go to trial in Michigan. Dateline's Josh Mankiewicz brings us up to speed and tells us why the case got under his skin. 13 years ago John Carter went on the Today show to beg the public for help finding his fiancée, Katelyn Markham. Now, on the eve of trial, another public statement from him upends the case.

NBC10 Boston is covering Karen Read's trial.

Listen to the Dateline: Missing in America podcast.

WLWT Cincinnati has the latest on Katelyn Markham's case.