PHOENIX — Letters purporting to offer information about illegal immigrants are among a vast array of evidence to be introduced in the class-action civil rights trial against Sheriff Joe Arpaio and his Maricopa County Sheriff’s Office that began on Thursday in Federal District Court here.

Read more in The New York Times: http://www.nytimes.com/2012/07/20/us/sheriff-joe-arpaio-trial-opens-in-phoenix.html?_r=1&src=rechp