In October 2011, the FBI added Juggalos (followers of Insane Clown Posse) to its National Gang Threat Assessment (PDF).

From the report:

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, according to NGiC reporting.

NGiC reporting indicates that Juggalo gangs are

expanding in New Mexico primarily because they

are attracted to the tribal and cultural traditions

of the Native Americans residing nearby.