the "support our law enforcement and safe neighborhoods act" (arizona sb 1070,) was enacted by the arizona legislature in 2010 as a response to broad public dislike of illegal immigration among arizona voters, and by a widespread belief that a great deal of crime was being committed by illegal immigrants that persisted despite a scholarly consensus that illegal immigrants commit proportionately fewer crimes than american citizens. public support for the bill was driven by the march 2010 murder of arizona rancher robert krentz.