Flowers and cards left as people paying tribute to Bob Lee near the Portside apartment building in San Francisco, California, on April 7, 2023.

Tayfun Coskun | Anadolu Agency | Getty Images

Cash App founder Bob Lee was fatally stabbed by an IT consultant near downtown San Francisco after the two men got into an argument over the suspect’s sister, according to court documents obtained by NBC News on Friday.

The suspect — 38-year-old Nima Momeni of Emeryville, a suburb of San Francisco — drove Lee to a secluded area and stabbed him three times with a 4-inch kitchen knife, including twice in the chest, according to the documents. At least one of the stab wounds punctured Lee’s heart.

In the wake of the dispute, Momeni’s sister sent a text to Lee, the documents show. “Just wanted to make sure your doing ok Cause [I] know nima came wayyyyyy down hard on you,” she wrote, according to the documents.

“Thank you for being such a classy man handling it with class,” she added. “Love you Selfish pricks.”

Momeni was arrested on Thursday morning after a nine-day manhunt that attracted national attention and intensified scrutiny on public safety issues in the Bay Area.

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He will be charged with murder, San Francisco’s district attorney told reporters on Thursday. He is scheduled to be arraigned on April 25, a spokesman for the district attorney’s office confirmed. He faces 26 years to life behind bars.

The court documents, which the San Francisco district attorney’s office filed Friday as part of their attempt to detain the suspect without bail, attempt to piece together the events that led to the stabbing.

Lee and a friend interviewed by police had been hanging out in a hotel room in San Francisco on the evening of April 3, according to the documents. The friend, identified in the filings as Witness 1, noticed Lee having a conversation with Momeni.

The witness saw Momeni asking Lee whether Momeni’s sister had been “doing drugs or anything inappropriate” earlier that day. Lee had to “reassure” Momeni that “nothing inappropriate had happened,” according to the documents.

Later that night, a surveillance camera recorded Lee and Momeni getting into Momeni’s white BMW outside Momeni’s sister’s apartment. Additional footage obtained by police shows the BMW heading to a “dark and secluded area” near downtown San Francisco.

The two men are later seen standing together on a sidewalk for a few minutes before Momeni apparently stabs Lee. When police officers arrived at the scene around 2:30 a.m., according to the documents, they found Lee unresponsive, lying in the street and bleeding “uncontrollably.”

“Defendant did not use some type of pocket knife, but a cooking knife from an apartment and kitchen,” the court documents state. “This was a planned and deliberate attack.”