What is it?

The Illegal Immigration Reform and Immigrant Responsibility Act (IIRAIRA), effective September 30, 1996, added Section 287(g), performance of immigration officer functions by state officers and employees, to the Immigration and Nationality Act (INA). This authorizes the secretary of the U.S. Department of Homeland Security (DHS) to enter into agreements with state and local law enforcement agencies, permitting designated officers to perform immigration law enforcement functions, pursuant to a Memorandum of Agreement (MOA), provided that the local law enforcement officers receive appropriate training and function under the supervision of sworn U.S. Immigration and Customs Enforcement (ICE) officers.

The cross-designation between ICE and state and local patrol officers, detectives, investigators and correctional officers working in conjunction with ICE allows these local and state officers: necessary resources and latitude to pursue investigations relating to violent crimes, human smuggling, gang/organized crime activity, sexual-related offenses, narcotics smuggling and money laundering; and increased resources and support in more remote geographical locations.

Link to the program, Fact Sheet.

Articles:

5/13/2008
State, local cops swamp DHS-ICE 287g immigration program training program
States and cities that want to speed up deportations of criminals and suspects who are illegal immigrants by using a popular but controversial federal program face waiting up to three years to join the enforcement effort, because the federal government cant keep up with the demand