Driver error and speed were factors in a single-vehicle wreck on July 9 that killed three south Georgia high school football players and injured a fourth, a Georgia State Patrol official said Thursday.

Rising Brooks County High School senior and linebacker Jicarre Watkins was driving teammates Shawn Waters, Johnie Parker and De’Vron Whitfield from morning football practice when his SUV careened off Webster Road, rolled and slammed into a pecan tree in an area of Brooks County, 20 miles west of Valdosta.

Whitfield, who was ejected from the vehicle, was the only survivor.

Investigators concluded that Watkins, for unknown reasons, drove about a foot off the roadway and then tried to regain control, causing the SUV to run into a ditch and roll over before striking the tree, Taylor said.

The SUV was traveling about 70 mph, above the posted 55-mph speed limit at the time of the crash, he said.

Alcohol or drug use is not suspected, but tests for those are pending, Taylor said.

Here's an earlier story on the accident on ajc.com.