Caleb Keeter, a guitarist for the Josh Abbott Band, says, "my biggest regret is that I stubbornly didn't realize it until my brothers on the road and myself were threatened by it."
The American rock singer, who fronted The Heartbreakers and was also beloved as a member of The Traveling Wilburys, has died after suffering cardiac arrest.
Gunfire rained down on a country music concert attended by thousands of people Sunday night. More than 500 people were taken to hospitals, in the deadliest mass shooting in modern U.S. history.