New details about a deadly hot air balloon crash in January were revealed in the autopsy report of the pilot, Cornelius Van der Walt. The report said drug tests found that Van der Walt had "60 times the threshold" of ketamine in his blood at the time.
The autopsy report detailed the various injuries he sustained, including multiple rib fractures, muscle injuries, a brain hemorrhage, and large bruises on his head, and concluded the injuries caused his death.
Four people, including Van der Walt, were killed in the crash.
The balloon lifted off with 13 people, including Van der Walt, on January 13. Once the balloon reached 5,000 feet, eight skydivers jumped out as planned.
After they jumped, the hot air balloon began to deflate and lose altitude.
"Immediately after the skydiving members of the party had jumped, the balloon was witnessed to partially deflate and begin to lose altitude, dropping to approximately 4,000 ft., where witnesses reported that the craft seemed to regain some control but continued to descend," a report by National Transportation Safety Board said.
When the balloon was at an altitude of about 2,000 feet, it began to free fall and crashed into the ground, killing Van der Walt, Chayton Wiescholek, Kaitlynn Bartom, and Atahan Kiliccote.
Valerie Stutterheim survived the crash and suffered a traumatic brain injury.
The Federal Aviation Administration is still investigating the deadly crash, but an initial report found damage at the top of the balloon's envelope. The NTSB also found an "unspecified problem" with the balloon's envelope.
The agencies said that the crash remains under investigation and noted that investigations can take up to two years to finish.