Prosecutors say Bob Lee’s fatal stabbing was ‘planned’ and a witness overheard him arguing with the suspect about his sister

(Credit: Tayfun Coskun/Anadolu Agency via Getty Images)

The fatal stabbing of Silicon Valley executive Bob Lee with a kitchen knife on a downtown San Francisco street last week followed a night of socializing with friends, including the sister of the IT entrepreneur accused of murdering him, local prosecutors said in a court filing.

San Francisco District Attorney Brooke Jenkins urged a state judge not to grant bail and release suspect Nima Momeni, saying the slaying was “planned and deliberate” and that “detention is necessary to protect public safety.”