In pretrial hearings for Bryan Kohberger, unsealed court documents reveal chilling texts sent by the roommates of four murdered Idaho students. The family of a young woman murdered in New York wants to know why the arrest of her suspected killer took so long. And we've got an update on the investigation into a student who went missing from a beach in the Dominican Republic. Plus, what's fair game when attorneys call on expert witnesses?

Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

A California jury hears chilling details about the murder of hairstylist Fabio Sementilli from the man who admits he helped kill him. In Kansas, the lead detective on a double murder case is called to the witness stand by the woman charged with the murders. She's representing herself. We've got the latest on the investigation into the death of Hollywood actor Gene Hackman. Plus, NBC News' Vicky Nguyen is back with tips on how to avoid travel scams.

An officer goes undercover with an alleged killer in the Hollywood hair stylist case. We're listening in. A woman's third murder trial in three decades is underway. This time, she's acting as attorney and defendant — and cross-examining her own children. We've got updates on Karen Read and Adnan Syed, and a verdict in Hawaii. Plus, the latest on a new texting scam targeting drivers. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

A dentist already facing murder charges for allegedly poisoning his wife is back in court. This time he's accused of plotting to murder four other people from behind bars. In Honolulu, a man accused of murdering his wife's acupuncturist ex-lover takes the stand in his own defense. More from the courtroom ahead of the trials of Karen Read and Bryan Kohberger. Plus, Keith Morrison talks about the unusual clue that broke the case wide open in his latest podcast series, "Murder in the Moonlight."

Three months after the husband of a woman who went missing in Spain is charged with her murder, investigators have questions about his brother, too. Years after a young woman's death in Pennsylvania, her parents persuade local officials to take a second look at how she died. And the judge from the Jason Chen murder trial on why he allows jurors to question witnesses during trial. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

In a Los Angeles courtroom, prosecutors play police interviews with a woman accused of conspiring to kill her celebrity hairstylist husband. NBC News investigative reporter Rich Schapiro shares his reporting on a Bay Area-based group that investigators believe may be tied to deaths starting back in 2022. And JonBenét Ramsey's father talks to the new Boulder police chief. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

Read Rich Schapiro's NBC News article How did a German math genius get drawn into a 'cult' accused in coast-to-coast killings?

Listen to this week's episode of the Dateline: True Crime Weekly podcast with Andrea Canning. In West Virginia, there was emotional testimony last week from the children of the pharmacist accused of poisoning her husband. This week the jury returned its verdict. KHNL reporter Mark Carpenter has details on a Hawaii man standing trial - again - for allegedly shooting his wife's acupuncturist lover. And Bryan Kohberger's defense team urges a judge to throw out a key piece of the prosecution's case. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

In Tennessee, a jury worked over the long weekend and arrived at a verdict in the murder trial of Jason Chen. Eight years ago, in an upscale neighborhood in Los Angeles, celebrity hair stylist Fabio Sementilli was stabbed to death. This week, the trial finally begins for one of the suspects in the case: his wife, Monica. And Karen Read is making headlines again. Plus, how to avoid scammers trying to take advantage of natural disasters. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com