We wrote last week about the April 4th murder in San Francisco of tech executive Bob Lee, the CEO of Cash App. As my colleague Nick Arama wrote:

The tech entrepreneur, who was also the chief product officer of MobileCoin, was walking in Rep. Nancy Pelosi’s district, in the supposedly safer, well-to-do Rincon Hill area of San Francisco in the early hours of the morning on Tuesday when he was stabbed twice in the chest. He called 911, pleading for help, crying out that he’d been stabbed. Video footage shows him walking holding his phone and his side. He begged for help from a driver. Heartbreaking video from a nearby building showed him lifting his shirt to show a driver his wounds to prove that he needed help, but the driver drove away, and Lee collapsed to the ground. Police arrived six minutes later and he was taken to San Francisco General Hospital, but he died.

Arama added that while Lee had recently relocated to Miami, Florida, he was back in town last week for a conference connected to MobileCoin.

Now, a suspect has been arrested for Lee’s murder, according to the San Francisco Chronicle, and the details raise more questions than they answer:

San Francisco police made an arrest Thursday morning in connection with the stabbing death of CashApp founder Bob Lee, a crime that convulsed the city’s tech community and inflamed fears of surging violence downtown.

Jail records showed 38 year-old Emeryville resident Nima Momeni was booked on suspicion of murder at 9:19 a.m. Thursday morning. Momeni was not immediately able to respond to a text message, and his voicemail box was full. He previously described himself as an information technology consultant and entrepreneur. His LinkedIn profile lists him as an “IT Consultant/Entrepreneur” at a company called Expand IT.

A neighbor described how the tech entrepreneur’s arrest went down, and gives some insight into Momeni’s character:

Police approached the Momeni’s home at the sprawling Besler building in Emeryville – a former steam car manufacturing plant converted to live-work lofts – at 5:05 a.m. Thursday, neighbors said. Chris Donatiello, who lives a floor above the building’s entrance on Harlan Street, said he awoke to a bellow over loudspeakers, saying, “We have a warrant for your arrest, come out with your hands up.”

Peering outside, Donatiello glimpsed five or six officers in full SWAT gear standing in front of the building, with two near the front door and three or four in the parking lot, he said.

Donatiello knew Momeni from brief encounters at the Besler, and characterized him as “a super nice guy.”

The Chronicle also spoke to public affairs consultant Sam Singer, whose business is next door to Momeni’s. Singer called him “warm and welcoming”:

“I was coming into our brand new East Bay office, and his door was open, so I knocked to introduce myself,” Singer recalled. Momeni answered and gave Singer a tour of his unit, which he had furnished with a pool table and scads of technology equipment.  With its grid of windows and inlaid brick facade, the Besler has housed architects, lawyers, artists, techies and the occasional Emeryville politician.

Momeni seemed “warm and welcoming,” Singer said, remember how Momeni popped into his office, admired the space and offered information technology services should Singer’s company ever need them.

What’s even more puzzling is that there appear to be no violent crimes in his past, with court records showing that Momeni had only misdemeanors on his rap sheet:

Alameda County court records show that in 2011 he was charged with allegedly selling a switchblade knife and driving with a suspended license, both misdemeanors. He pleaded no contest to the suspended license charge the following year and the knife charge was dismissed. He was sentenced to 10 days in jail as well as three years of probation, fined more than $900 and ordered to destroy the knife.

Additionally, Momeni was charged with a misdemeanor in 2004 for allegedly driving while intoxicated.