Kristen Dark, a sheriff’s office spokesperson, said deputies responded to the 9700 block of Reservoir Court just before 4 a.m. Sunday after a 911 caller reported hearing gunfire.
Multiple shots were fired after an altercation outside the nightclub, where Dark said nearly 400 people were either inside or in the parking lot at the time of the incident.
Hornsby was pronounced dead at the scene at 4:22 a.m. Williamson was taken to a hospital for treatment, where she was pronounced dead at 5:14 a.m.
The sheriff’s office said its investigation indicates Hornsby and Williamson knew each other and that there is no ongoing threat to the public.
The investigation remains ongoing.
Anyone with additional information about the incident is asked to call the sheriff’s office tipline at 512-854-1444 or Crime Stoppers at 512-472-8477.
— Staff writer Dante Motley contributed to this report.