East Bay man accused of killing tech exec Bob Lee pleads not guilty to murder charge at arraignment

(CNN) — The man accused of fatally stabbing the tech executive Bob Lee last month pleaded not guilty to murder in a San Francisco court Thursday.

Nima Momeni will be held in custody without bail, the judge said.

Lee, a 43-year-old who cofounded the mobile payment service provider Cash App, was stabbed to death in the Rincon Hill neighborhood in the predawn hours of April 4. An autopsy report shows he suffered knife wounds that pierced his heart and lung.

Authorities have said Lee and Momeni knew each other and were in a white BMW shortly before the stabbing at about 2 a.m. The prosecution’s case relies heavily on grainy security video of what they say was the fatal stabbing, and the district attorney’s office has indicated the stabbing may have been premeditated.

“This is a person who was in his vehicle with a kitchen knife,” San Francisco District Attorney Brooke Jenkins said of the suspect earlier this month. “That’s not something most of us carry around at all times with us.”

However, an attorney for Momeni said “I don’t think you can see anything” in the security video and said she believes she has evidence to support his innocence.

A witness described as Lee’s close friend said Momeni and Lee had an earlier discussion about Momeni’s sister and “whether his sister was doing drugs or anything inappropriate,” according to court documents. Lee had told Momeni nothing inappropriate had happened, according to the document.

Further, a message from Momeni’s sister to Lee afterward showed the sister checking in on Lee. “Just wanted to make sure your doing ok Cause I know nima came wayyyyyy down hard on you And thank you for being such a classy man handling it with class,” she wrote, according to documents from the district attorney’s office.

The killing has rattled the San Francisco tech scene and spurred broader criticisms of crime in the city, including from Tesla and Twitter executive Elon Musk, who connected the killing to “repeat violent offenders” being released from custody. However, Jenkins criticized Musk’s statement as “reckless and irresponsible” and said his remarks “assumed incorrect circumstances” about the case.

Lee was the former chief technology officer of Square who helped launch Cash App. He later joined MobileCoin, a cryptocurrency and digital payments startup, in 2021 as its chief product officer.

Momeni has been the owner of an IT business, California Secretary of State records indicate. He has been held without bail since his arrest last month.

Prosecutors reliant on security video

Motion-to-detain documents and surveillance footage from the DA’s office last month laid out what authorities say preceded the stabbing.

The footage shows Momeni arriving at his sister’s apartment building in a white BMW around 8:30 p.m. on April 3, and later shows Lee entering the building around 12:39 a.m. on April 4.

A little after 2 a.m., security footage shows Lee and Momeni leaving the building and getting into Momeni’s BMW. Additional footage from the area shows the two driving in the car together.

Video then shows the BMW drive to a “dark and secluded area” on Main Street, just out of view for the video to see the interaction between the two men, per the document.

Eventually, the two subjects, who are unidentifiable by their faces but seem to be wearing the same clothing as earlier, appear back in frame. After about five minutes, the subject wearing a white-colored top, consistent with what Momeni appeared to be wearing, “suddenly move(s) toward the other subject,” the document says. The two subjects then separate.

The person in dark-colored clothing, who authorities believe to be Lee, walks northbound, while the person in the light-colored clothing walks south and stops along a fence, where a knife was ultimately recovered, the document says. The BMW then speeds away, the document states.

A kitchen knife was found near the scene, Jenkins said in a news conference.