Nineteen some odd months after the fatal San Francisco stabbing of tech exec Bob Lee, his accused killer's trial is underway. Tech entrepreneur and consultant Nima Momeni's sister, who is at the center of the case has testified.  During the prosecution's case, the lead police investigator lead jurors through the twists and turns of the two-day drug binge Lee was on with Khazar Momeni. Nima Momeni reportedly believed his sister was also attacked by Lee.   Bob Lee made a name for himself in the tech world, as a founder of Cash App. The 43-year-old exec recently move to Florida but was in San Francisco for business. Around 2:30 a.m. Lee calls police saying he had been stabbed. Surveillance footage captures Lee getting out of a car with another man. Quickly, the man drives away and Lee stumbles along Main Street in San Francisco's Rincon Hill neighborhood.  When police reach Lee, he has been stabbed three times, including two wounds in his upper left chest.   The man driving the car that sped away is identified as 38-year-old Nima Momeni, also a tech executive.  Texts from Momeni's married sister sent to Lee,  show a connection between the two. Nima Momeni reportedly confronted, Lee implying "improper behavior"  Momeni was arrested after a nine-day manhunt.   Joining Nancy Grace Today: Jarrett Ferentino- Homicide Prosecutor in Pennsylvania, Facebook & Instagram: Jarrett Ferentino Dr. John Delatorre (D La Torrey) - Licensed Psychologist and Mediator (specializing in forensic psychology), Psychological Consultant to Project Absentis: a nonprofit organization that searches for missing persons; Twitter, IG, and TikTok: @drjohndelatorre Irv Brandt - Senior Inspector, US Marshals Service International Investigations Branch, Chief Inspector, DOJ Office of International Affairs; Author: “SOLO SHOT: CURSE OF THE BLUE STONE," and FLYING SOLO: Top of the World"  AVAILABLE ON AMAZON; Top of the World" Twitter: @JackSoloAuthor  Dr. Maneesha Pandey- Chief Forensic Pathologist for Forensic Pathologists LLC in Ohio, Board-certified forensic pathologist Ben Levitan- Telecommunications Expert, Columnist Jen Smith- Chief Reporter for DailyMail.com; Twitter: @Jen_e_smith  See omnystudio.com/listener for privacy information.