Apparently, Sheriff Joe Arpaio of Maricopa County, Ariz. likes to raid Latino neighborhoods and he appears to think very highly of himself, calling himself "America's toughest Sheriff." An abstract from a New Yorker story in July:
Describes how Arpaio has transformed the sheriff’s office into a sort of freelance immigration-enforcement agency. A federal program known as 287(g) allows state and local officers to be cross-trained by Homeland Security and work in immigration enforcement. Arpaio’s deputies have conducted extensive raids on Latino towns and neighborhoods. NYorker
