Flowers sit at a tree in front of the building where technology executive Bob Lee was fatally stabbed. An arrest has been made in connection with the killing of Cash App founder Bob Lee. San Francisco police apprehended a man Emeryville, California, early Thursday, Mission Local reported. Initial reports claim the suspect personally knew Lee. Lee’s ex-wife Krista Lee confirmed an arrest was made in an interview with KTVU Fox 2 early Thursday. “This is the first step toward justice,” she said.