TAHLEQUAH, Okla. — The five Northeastern State University students were killed in September near Tahlequah.
On Wednesday, the Oklahoma Highway Patrol just released the cause of a crash.
Investigators say the wreck was caused by unsafe speed on a curve and a wet roadway.
The truck went off the road, slammed through a guardrail and plummeted about 35 feet into a creek, landing on its top.
The report says that the driver, 18-year-old Donovan Caldwell of Muskogee, was not impaired at the time of the crash.
Caldwell was killed in the wreck along with 18-year-old Jessica Swartwout of McAlester; 19-year-old Drake Wells of Thackerville; 18-year-old Rhianna Seely of Salina; and 18-year-old Lily Murphy of Gentry of Arkansas.