Police in Ohio say they still have no idea why a gunman shot and killed rock guitarist Darrell Abbott and three others at a concert on Wednesday.
Guitarist 'Dimebag' Darrell Abbott was shot dead on stage
Spokesman Sgt Brent Mull said they did not know Nathan Gale's motive and probably never would.
Gale, 25, climbed onstage during the concert by metal band Damageplan and fired more than a dozen shots before being shot dead by police.
Police said two people wounded in the shooting were still in hospital.
Damageplan, formed from Grammy-nominated group Pantera, had just begun their set at the Alrosa Villa club in Columbus when the violence broke out.
Sgt Mull said some witnesses reported hearing Gale accuse Abbott of being responsible for splitting up Pantera.
However, he said the loud music made it impossible to be sure what the attacker had said.
Sgt Mull said an officer arrived shortly after the shooting began.
"If the officer wasn't as close as he was, I think this would have been a lot worse," he said. "It was a chaotic scene, just a horrific scene."
Two of the other dead were named as Erin Bray and Nathan Halk by the Columbus police department.
Damageplan were formed in 2003 by guitarist "Dimebag" Darrell Abbott and drummer brother Vinnie Paul after their former band, Pantera, split up.
Pantera were one of the most popular metal bands of the early 1990s, topping the US album charts and getting a Grammy nomination for 1994 release Far Beyond Driven.
The pair were joined in the new band by singer Pat Lachman and bassist Bob "Zilla" Kakaha.