The pickup truck actually circled the block a couple of times before coming back, driving up over the curb and driving down the sidewalk to run over these individuals,
According to the Tulsa World, the pickup is described as a small, white mid 80s to 90s truck.
The driver who fled the scene is described as a white male in his 40s, wearing a baseball cap.
http://kfor.com/2017/09/04/police-driver-intentionally-ran-over-three-homeless-people-in-tulsa-killing-one/
This area is near the jail, Salvation Army Shelter and numerous 24/7 bail bond offices. In other words MULTIPLE cameras. I hope the police are able to release a picture of the truck and possible the driver soon, or even better, they already have a suspect.