From this:

Arizona prison officials say taxpayers are paying more than $28,000 a day to incarcerate hundreds of undocumented immigrants because the federal government hasn't filed the paperwork necessary to deport them to Mexico.

Arizona Department of Corrections Director Dora Schriro said deporting such criminals should be a "no-brainer" given the money that could be saved and the beds that could be freed in the state's overcrowded prison system.

Formal deportation orders for 46 of the 526 eligible inmates have been on file for several months, but state prison officials can't get Immigration and Customs Enforcement to pick them up, Schriro said.