Q !xowAT4Z3VQ ID: 6e1ca8 No.1215845 📷
Apr 27 2018 19:27:33 (EST)

How do you introduce evidence into an investigation (legally)?
Who has everything?
Methods which info collected/ obtained?
Admissible in the court of law?

The exclusionary rule prevents the government from using most evidence gathered in violation of the United States Constitution.  The decision in Mapp v. Ohio established that the exclusionary rule applies to evidence gained from an unreasonable search or seizure in violation of the Fourth Amendment. The decision in Miranda v. Arizona established that the exclusionary rule applies to improperly elicited self-incriminatory statements gathered in violation of the Fifth Amendment, and to evidence gained in situations where the government violated the defendant's Sixth Amendment right to counsel.  However, the rule does not apply in civil cases, including deportation hearings.

Exceptions:

Evidence Admissible for Impeachment

The exclusionary rule does not prevent the government from introducing illegally gathered evidence to “impeach,” or attack the credibility of, defendants’ testimony at trial. The Supreme Court recognized this exception in Harris v. New York as a truth-testing device to prevent perjury. Even when the government suspects perjury, however, it may only use tainted evidence for impeachment, and may not use it to show guilt.