During the show, the Juggalos are transported, erupting when Violent J and Shaggy 2 Dope let it all rip. Their set climaxes with a routine in which 800 bottles of fizzy Faygo soda are unleashed on the audience.
While the music has fans invigorated, its message has raised eyebrows among law enforcement.
"We can't necessarily say that [the music's] to blame. But I think it definitely does have some influences," said Vasey, who came across the Juggalos in Arizona. "As an officer we have to decide when we're talking to these guys, who do we need to worry about and who don't we need to worry about."
After a series of murders and other violent acts linked to their followers, Juggalos are now classified as a gang in Utah, Arizona and Monroe County, Pa.
"I don't want people to go out there and look at every Juggalo and say, 'Oh, he's a gang member, he's got a machete and he's going to slice and dice everybody,'" Vasey said. "But people need to be aware that there are huge issues that have evolved in just the last three years both in the eastern and western United States where we've got multiple individuals committing gang-related crimes, gang-motivated crimes, and they're using the name Juggalo."
In connection with the murder of Goucher, Shawn Freemore, one of the accused, was wearing an ICP T-shirt at the time of his arrest and police say he wrote a rap about the alleged killing: "Sitting here quietly thinking about my sin, Over and over about the knife going in. I try to comprehend exactly what we did, Just stealing the life of some poor kid."
"Some of the homicides that we're seeing with these guys are pretty nasty, gruesome, disgusting homicides," Vasey said. "Where they don't care who's around, what's around, they're just out to kill anybody."
The crimes are mounting. Horrorcore rapper Sam McCroskey, also known as "Syko Sam," was charged last October with the brutal murder of his girlfriend and three others in Farmville, Va.
"There are Horrorcore rap artists out there that have no boundaries to what they say," Violent J said. "They talk about skinning babies and killing, anything they can possibly think of that horrible and grotesque, they rap about it. But ICP is a little more classy than that."
Violent J and Shaggy 2 Dope said their lyrics about rape, violence and murder -- including the song, "I'm Gonna Kill You" -- are strictly for entertainment and that they don't condone violence.
"If you're a kind of murderer to begin with, it might affect you," Violent J said. "But everybody else, I could take you to Wal-Mart and show you some pretty scaring sounding horror movies. Just by their name, P.S. I'll Kill You."
We asked Violent J about another disturbing string of lyrics he raps about stabbing people: "I stab people, 4 or 5 people every day. I'd like to see a shrink to stop that s--t, but it ain't no f--king way."
He said the verse might speak to his "subconscious anger, but not in real life."
"We're sitting here in clown paint, we're entertainers," Violent J said. "Anybody who reads that or hears that and takes that seriously, needs to seek help."
"Needs to see a shrink," Shaggy 2 Dope added.
On the serious criminal acts and murders that officials claim are connected in some way to the Juggalos or the ICP, Violent J denied the connection, "Bulls--t, it's not true."