premise: The Crips are not violent.
hypothesis: Crips . What was once a single alliance between two autonomous gangs is now a loosely connected network of individual sets , often engaged in open warfare with one another . The Crips are one of the largest and most violent associations of street gangs in the United States , with an estimated 30,000 to 35,000 members in 2008 . They have been involved in murders , robberies and drug dealing , among other crimes .