This is Insane Clown Posse.
They are a rap group from Michigan and the de facto icons of the Juggalo subculture.
A Juggalo is a person characterized by stark black-and-white clown-face makeup who listens to Insane Clown Posse's music. You could describe the band's music as aggressive, hard-core rap. Or maybe not: This writer has near-zero familiarity with their music.
A female Juggalo is a Juggalette, per Wikipedia.
Some Juggalos have, in recent times, been linked to gang violence — or at least that's how the federal government sees it. However, as Wired relays, the entirety of the "gang violence" categorization may rest on just two arrests in Salt Lake City in 2011, which prompted an investigation into possible gang activity.
Then, in 2011, the FBI categorized Juggalos as a "non-traditional gang" in their National Gang Threat Assement. In it, the FBI writes:
The Juggalos, a loosely-organized hybrid gang, are rapidly expanding into many US communities. Although recognized as a gang in only four states, many Juggalos subsets exhibit gang-like behavior and engage in criminal activity and violence. Law enforcement officials in at least 21 states have identified criminal Juggalo sub-sets....