When dozens of rounds of gunfire rained down on a crowd enjoying the final day of a country music festival, one teenager ran into the terror instead of away from it.
"As everyone ran away from the gunshots, I ran toward them, trying to find anybody that I could that was injured, couldn’t walk, wasn’t breathing, wasn’t responding," Bailey Thompson, a 17-year-old training in the Army, told NBC 7.
Thompson dodged bullets coming from the 32nd floor of the Mandalay Bay casino and hotel as he rushed to find wounded victims, loading them into the back of his truck and rushing them to safety.
He used whatever he had on him -- his belt, another person's belt, his shoelaces, his shirt -- to stop bleeding and help victims.
He stacked victims in the bed of his truck and rushed them to the hospital to get medical care.
Then, he went back to the scene of the mass shooting and helped save more.
By the end of the evening, Thompson had helped rescue 26 to 28 victims and helped load even more into ambulances.
But sadly, not everyone he helped made it through. By Monday afternoon, 58 were dead including the shooter and 527 injured in the deadliest mass shooting in modern U.S. history.
"Unfortunately, I had one male bleed out in the bed of my truck and two others that I helped load into an ambulance passed away also," he recalled. "Just a sad reality of what happened."
He said his parents raised him to do the right thing, even when no one is watching.
"I’m glad that I acted the way I acted and that a lot of other people acted as well," he said. "I hope that treatment goes well, I hope that everybody stays safe, and I pray for your families."
But despite the fact that he saved dozens, Thompson still feels guilty for the lives he could not save.
"I just want to apologize to the families of the people I could not save," Thompson said.
Even though he risked his own life to save others, he does not consider himself a hero.
"I don’t feel like a hero," he said. "I was doing what was right."
The Associated Press contributed to this report.