All three victims were from IL and at least two were from Aurora, Ill., said Beth, who spoke to distraught friends of the victims.
Hundreds of people at the drag strip were evacuated immediately following the shooting.
Beth said they did believe the suspect was a black man and had a black vehicle, but described other details about the murder as "sketchy".
Authorities continue to investigate the motive for the deadly shooting Sunday that killed three at a Kenosha County racetrack, despite getting little help from family members.
Ezekiel Elliott Will Appeal His Six Game Suspension by the NFL
The NFL's letter tried to offer Elliott some encouragement. "Our goal is for you to have as successful a career as possible". I'm sure he'll appeal and fight this all the way, but similar to Tom Brady's situation, it may not be enough.
Scaramucci: White House plotters seeking Trump exit
The president has a very good idea of the people that are undermining his agenda that are serving their own interests. And if he does that, he'll have a very successful legislative agenda that he'll be able to execute.
Colbert Interviews God, Mocks Trump's 'Divine Permission' To Fight North Korea
Stephen Colbert knows that some of his viewers rely on him to provide the news of day, albeit with a few jokes thrown into the mix. "Look North Korea, leave Guam out of this!" he exclaimed.
"It's a hard situation and I'd feel a lot better, if there's a way to feel better about this, if we had the suspect in custody", said Sheriff David Beth.
Three men died after they were shot at point-blank range during a auto race attended by thousands in Wisconsin, authorities said. "We're not aware of any altercations that might have happened earlier", Beth said. "We're not aware of any danger to the community", Beth said.
About 5,000 people were at the festival, Larry's Fun Fest, when the shooting occurred, reports say.
The type of weapon used in this incident is unknown, as is what might have precipitated this action. There were thousands and thousands of people and it was quite chaotic, " Beth said. "It didn't take us long to get everybody to leave", Malecki said.