[Washington, District of Columbia] : Congressional Research Service, 
[Getzville, NY] : William S. Hein & Co., 
1 online resource (27 pages).
CRS report for Congress ; R42924. Immigration law & policy in the U.S.
The term prosecutorial discretion is commonly used to describe the wide latitude that prosecutors have in determining when, whom, how, and even whether to prosecute apparent violations of the law. The Immigration and Naturalization Service (INS) and, later, the Department of Homeland Security (DHS) and its components have historically described themselves as exercising prosecutorial discretion in immigration enforcement. Some commentators have recently challenged this characterization on the grounds that DHS enforces primarily civil violations, and some of its components cannot be said to engage in "law enforcement," as that term is conventionally understood.
Bibliography, etc. Note
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Source of Description
Description based on PDF title page, viewed June 30, 2013.