(NewsNation) — The San Francisco Police Department has arrested a suspect in the stabbing death of Cash App founder Bob Lee, and it appears the attack was not a random act of violence.

In a press conference, the SFPD confirmed they arrested 38-year-old Nima Momeni in connection with the attack. Momeni owns a tech company called Expand IT and the SFPD did confirm Lee and Momeni knew each other, though they declined to give any additional details on the case.

San Francisco District Attorney Brooke Jenkins formally announced the charges against Momeni, including murder and an enhancement indicating the murder was committed with a knife. Momeni is expected to be arraigned on Friday and the office is asking he be detained without bail.

Jenkins also called out ” reckless and misleading” information spread by people in the wake of the crime. Lee’s death led to people voicing concern about increasing violence in San Francisco, but it appears this was not a robbery or random attack as some suggested.

On Twitter, San Francisco Supervisor Matt Dorsey tweeted his thanks to the SFPD for their work.

“Obviously, nothing can undo this senseless crime, and we reiterate our condolences to Mr. Lee’s family members, friends and colleagues. But I hope today’s arrest can begin a process of healing and closure for all those touched by this tragedy,” he wrote.

Police sources told Mission Local the pair were traveling in Momeni’s car before the attack. That could explain why Lee was walking in an area with little foot traffic. Police declined to confirm this information in a press conference, noting the ongoing investigation prevented them from disclosing additional information.

Lee was stabbed in San Francisco near the city’s Embarcadero waterfront in the early morning hours on Apr. 4. Security video footage showed the 43-year-old begging bystanders for help outside a luxury apartment building and being ignored.

Lee called 911 and police gave medical aid on the scene but Lee did not survive the attack. Friends remembered him as a friendly person and said the killing was shocking because Lee didn’t appear to have any enemies.