Bob Lee murder trial continues as defendant's sister Khazar Momeni takes the stand

Khazar Momeni, the sister of the man accused of fatally stabbing tech executive and Cash App founder Bob Lee in a remote San Francisco neighborhood, took the stand Thursday afternoon in Nima Momeni's trial.

Khazar Momeni, 38, appeared as a witness for the prosecution after the Thursday lunch break and was expected to be asked about her relationship with Lee and the circumstances that led up to Lee's death.

Taking the stand wearing a light blue long-sleeve dress, Khazar took a bottle of water offered to her by her mother before beginning her testimony.

Lee was repeatedly stabbed in the early morning hours of April 4, 2023 in San Francisco's Rincon Hill/East Cut neighborhood and died on the operating table at a hospital. Nima Momeni was arrested nine days later, with prosecutors alleging that he stabbed Lee with a kitchen knife after a heated discussion regarding his sister's relationship with Lee and their alleged drug use.

After being sworn in, Khazar Momeni was asked by prosecutor Dane Reinstedt how she learned of Bob Lee's death. She replied that a friend came to her house and told her that he had passed away.

When Reinstedt asked her when she learned that her brother killed Lee, she quickly said, "My brother was not the one who killed Bob."

The murder trial began Monday with prosecutors telling jurors they were "sitting in court with a murderer" and presenting a timeline of events leading to the killing. Assistant District Attorney Omid Talai's opening statement included describing a text from Khazar Momeni to her brother which said, "You're f***ing psychotic at times," in reference to a confrontation her brother had with Lee.

Charging documents have alleged some type of relationship between Lee and Khazar Momeni , who is married to a prominent San Francisco plastic surgeon, and described other worried text messages she sent to Lee about her brother confronting Lee. The Wall Street Journal reported Lee and Khazar Momeni belonged to a sex and drugs-fueled underground party scene known in wealthy Bay Area tech circles as "The Lifestyle."

Nima Momeni has pleaded not guilty to the murder and his attorneys will argue that their client acted in self-defense to what they call a "flash of aggression" from a cocaine-addled Lee.

On Wednesday, jurors heard from Borzoyeh "Bo" Mohazzabi , a friend of Lee's and fellow tech entrepreneur who testified that on the night of Lee's murder, he and Lee saw Khazar Momeni at a friend's house earlier in the afternoon, where she was seen using multiple "whip-its," a slang term for nitrous oxide gas cannisters that people inhale to get high.

As the men were leaving the apartment, a female friend of Khazar's arrived. The women consumed the drug GHB and had a bad reaction, which led to Khazar's brother Nima coming to pick them up and precipitated Nima's later angry phone call with Lee.

Mohazzabi characterized Lee's mood during those hours as calm and not angry.