Immigration & Naturalization Service v. Lopez-Mendoza

announced the judgment of the Court and delivered the opinion of the Court with respect to Parts I, II, III, and IV, and an opinion with respect to Part V, in which Justice Blackmun, Justice Powell, and Justice Rehnquist joined.*

This litigation requires us to decide whether an admission of unlawful presence in this country made subsequently to an allegedly unlawful arrest must be excluded as evidence in a civil deportation hearing. We hold that the exclusionary rule need not be applied in such a proceeding.

I

Respondents Adan Lopez-Mendoza and Elias Sandoval-Sanchez, both citizens of Mexico,…