State and local police made about 150,000 arrests that resulted in deportation from late 2007 to late 2011 under a program that empowers specially trained local officers to enforce immigration laws. Deportations under that program peaked in 2009 but are falling sharply as the federal government phases it out.

In the fingerprinting program, state and local agencies are responsible for the vast majority of another roughly 150,000 deportations during that time. ICE scans prints of everyone booked into jails for non-immigration crimes and tells local police when they want someone held for deportation proceedings.

The combined efforts account for 288,997 of Immigration and Customs Enforcement's deportations from October 2007 through September 2011, or 18.7 percent of the total. And the number is growing each year.

In fiscal 2009, they accounted for 59,984 of 389,834, or only 15 percent, of deportations. In 2011, they were 105,849 of 396,906 deportations, or 27 percent.