Nieneker shot Chow and Fung, killing them both. Doris Chow pulled her granddaughter from the vehicle, but Nieneker shoved her aside and sped away in the 4Runner. Chow and Fung were pronounced dead at the scene shortly afterward.
What followed was a chaotic citywide rampage. Police say Nieneker drove across Austin, crashing into multiple vehicles, assaulting drivers, and attempting carjackings. Around 2:20 p.m., he allegedly forced a construction worker from a water truck on Mopac Expressway before abandoning it and returning to the stolen SUV. Minutes later, he collided with a Volkswagen and an Infiniti SUV, assaulted the Volkswagen’s female driver, and stole her car.