The 911 call in the Hollywood hairdresser murder. And investigators explore links between six violent deaths and a group called the Zizians.

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.