DALLAS (AP) — A Texas man, not his 13-year-old son, was driving the pickup truck that crossed into the oncoming lane and struck a van carrying New Mexico college golfers, killing nine people, and he had methamphetamine in his system, investigators said Thursday.

The National Transportation Safety Board said two days after the March 15 collision that its early findings suggested that the 13-year-old was driving the pickup that struck the van carrying University of the Southwest students and coaches back to Hobbs, New Mexico, from a golf tournament in Midland, Texas. But the NTSB said in a preliminary report released Thursday that DNA testing confirmed that the father, 38-year-old Henrich Siemens, was driving and that toxicological testing showed the presence of methamphetamine in the Siemens' blood.

Siemens and his son died in the crash along with six members of the men's and women's golf teams and their coach, who was driving the van.

Nine people died in a fiery, head-on collision in West Texas, including six students and a coach from a New Mexico university who were returning home from a golf tournament, authorities said. A pickup truck crossed the center line of a two-lane road in Andrews County, about 30 miles (50 kilometers) east of the New Mexico state line on Tuesday evening and crashed into a van carrying members of the University of the Southwest men's and women's golf teams, said Sgt. Steven Blanco of the Texas Department of Public Safety. Six students and a faculty member were killed in the crash along with the driver and a passenger in the pickup truck, Blanco said. Two students were taken in critical condition by helicopter to a hospital in Lubbock, about 110 miles (180 kilometers) to the northeast. Golf coach Tyler James died, according to his mother, June James, adding that she knew little about the circumstances. He coached the men and the women. Tyler James was in his first season coaching the men's and women's golf program at the University of the Southwest.

The collision happened at about 8:17 p.m. in Andrews County, which is roughly 30 miles (50 kilometers) east of Texas' border with New Mexico. Although it's a rural area, the roads there are often busy with traffic related to agriculture and oil and gas development.

In the days after the crash, the NTSB had said that the truck's left front tire blew before impact. But it said Thursday that so far, investigators haven't found evidence of a loss in tire pressure or any other indicators that the tire failed.

The NTSB said the road they were traveling on consisted of a northbound lane and southbound lane. Near the crash site, the roadway was straight but there was no highway lighting.

Those killed in the van were coach Tyler James, 26, of Hobbs, New Mexico; and players Mauricio Sanchez, 19, of Mexico; Travis Garcia, 19, of Pleasanton, Texas; Jackson Zinn, 22, of Westminster, Colorado; Karisa Raines, 21, of Fort Stockton, Texas; Laci Stone, 18, of Nocona, Texas; and Tiago Sousa, 18, of Portugal.

Two other students aboard the van were seriously injured.

The crash is still being investigated to determine the probable case of the crash, the NTSB said.

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