Criminal defendants are expected to make initial appearances in federal courts in Phoenix and Tucson on Friday in connection with what one federal agency calls the largest human smuggling investigation in its history . Hidden in Plain Sight deals ` ` serious blow '' to Arizona , Homeland Security official said . Eight hundred soldiers and officers from nine agencies mobilized in Arizona . Additionally , employees of 5 Arizona shuttle services are among those taken into custody . Saying U.S. officials ` ` mixed messages , '' raids ' timing draws ire of immigration group leaders .
Hidden in Plain Sight deals ` ` serious blow '' to Arizona , Homeland Security official said . Eight hundred soldiers and officers from nine agencies mobilized in Arizona . Additionally , employees of 5 Arizona shuttle services are among those taken into custody . Saying U.S. officials ` ` mixed messages , '' raids ' timing draws ire of immigration group leaders .