San Francisco police are looking for evidence and leads to catch the person who stabbed and killed Cash App founder Bob Lee early Tuesday morning. A wounded Lee was holding his side as he walked up to a driver in a parked vehicle that had its hazard lights on, according to surveillance video obtained by the San Francisco Standard. He appeared to show the driver his injury before collapsing. The vehicle drove away without visibly offering help, according to the paper. More LiveNOW from FOX streaming video Subscribe to LiveNOW from FOX! https://www.youtube.com/livenowfox?sub_confirmation=1 Where to watch LiveNOW from FOX: https://www.livenowfox.com/ Follow us @LiveNOWFOX on Twitter: https://twitter.com/livenowfox Raw and unfiltered. Watch a non-stop stream of breaking news, live events and stories across the nation. Limited commentary. No opinion. Experience LiveNOW from FOX.