Two legal doctrines govern the suppression of evidence and termination of removal proceedings following constitutional or regulatory violations in immigration enforcement. The Lopez-Mendoza doctrine governs suppression of evidence obtained in violation of constitutional rights. The Accardi doctrine governs suppression of evidence and termination of removal proceedings following violations of regulatory rights. However, the expanding involvement of state and local law enforcement agencies in immigration enforcement, particularly through 287(g) agreements, calls into question the applicability of these two doctrines. This Note analyzes the Lopez-Mendoza and Accardi doctrines in light of the new enforcement context presented by 287(g) agreements; it concludes that reexamination of the Lopez-Mendoza doctrine is required and that full application of the Accardi doctrine is warranted in the 287(g) context.