21.3 The Exclusionary Rule, Standing & Fruit of the Poisonous Tree

21.3 The Exclusionary Rule, Standing & Fruit of the Poisonous Tree

The exclusionary rule is a judicially created remedy designed to deter police misconduct, not a personal constitutional right. As a result, the Supreme Court applies it only when the deterrence benefits outweigh its costs, only at the request of a person whose own rights were violated, and subject to several exceptions.

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The Leon Good Faith Exception

Under United States v. Leon (1984) and Massachusetts v. Sheppard (1984), evidence obtained by police officers acting in objective, reasonable reliance on a search warrant issued by a detached magistrate is admissible, even if the warrant is subsequently determined to be invalid for lack of probable cause.

The Four Exceptions to Leon Good Faith (Exclusionary Rule Still Applies)

The good-faith exception does not protect evidence, and suppression remains mandatory, if any of the following four conditions exists:

1. Bare-Bones Affidavit: The affidavit supporting the warrant is so completely lacking in indicia of probable cause that official belief in its existence is entirely unreasonable (e.g., officer swears merely that "I have cause to suspect drugs are in the barn").
2. Abandoned Judicial Neutrality: The magistrate wholly abandoned their neutral and detached judicial role (e.g., acted as a rubber stamp or personally accompanied officers on the raid to assist in the search).
3. Franks Hearing / Falsehoods: The affiant officer misled the magistrate by providing false statements knowingly or with reckless disregard for the truth. Under Franks v. Delaware (1978), if the defendant proves by a preponderance of the evidence that false statements were included intentionally or recklessly, the court excises the false material; if the remaining affidavit lacks probable cause, the warrant is voided and evidence suppressed.
4. Facially Deficient Warrant: The warrant itself is so utterly deficient in particularity (e.g., fails entirely to specify the place to be searched or items to be seized) that no executing officer could reasonably presume it to be valid.

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The Exclusionary Rule & Fruit of the Poisonous Tree

The Exclusionary Rule suppresses physical evidence and statements directly obtained through unconstitutional police searches or seizures (Mapp v. Ohio). Under the Fruit of the Poisonous Tree doctrine (Wong Sun v. United States), any secondary or derivative evidence discovered as a result of an initial constitutional violation is also excluded.

                      ┌──────────────────────────────────────────────┐
                      │     INITIAL CONSTITUTIONAL VIOLATION         │
                      │     ("The Poisonous Tree")                   │
                      └──────────────────────┬───────────────────────┘
                                             │ Direct Derivative Evidence
                                             ▼
                      ┌──────────────────────────────────────────────┐
                      │  IS THE EVIDENCE PURGED OF THE TAINT?        │
                      └──────────────────────┬───────────────────────┘
                                             │
             ┌──────────────┬────────────────┼───────────────┬──────────────┐
             ▼              ▼                ▼               ▼              ▼
      ┌───────────┐  ┌───────────┐    ┌───────────┐   ┌───────────┐  ┌───────────┐
      │INDEPENDENT│  │INEVITABLE │    │ATTENUATION│   │   LEON    │  │   NO      │
      │  SOURCE   │  │ DISCOVERY │    │ OF TAINT  │   │GOOD FAITH │  │ EXCEPTION │
      │Untainted  │  │Lawful     │    │Intervening│   │Defective  │  │  APPLIES  │
      │origin     │  │inevitable │    │acts, time,│   │warrant in │  │           │
      │(Murray)   │  │investig.  │    │warrant    │   │good faith │  │           │
      │           │  │(Nix)      │    │(Strieff)  │   │           │  │           │
      └─────┬─────┘  └─────┬─────┘    └─────┬─────┘   └─────┬─────┘  └─────┬─────┘
            │              │                │               │              │
            └──────────────┴───────┬────────┴───────────────┘              │
                                   ▼                                       ▼
                         ┌───────────────────┐                   ┌───────────────────┐
                         │    ADMISSIBLE     │                   │   SUPPRESSED      │
                         │   (Taint Purged)  │                   │   (Excluded)      │
                         └───────────────────┘                   └───────────────────┘

The Four Taint-Purging Exceptions

1. Independent Source (Murray v. United States [1988]): Evidence will not be suppressed if it was discovered through an entirely independent, untainted source wholly separate from the unconstitutional conduct.
2. Inevitable Discovery (Nix v. Williams [1984]): If the prosecution establishes by a preponderance of the evidence that the challenged evidence would have been inevitably discovered by lawful police procedures already underway, the evidence is admissible.
3. Attenuation of the Taint (Utah v. Strieff [2016]; Brown v. Illinois [1975]): The connection between the unconstitutional police conduct and the discovered evidence becomes so remote or attenuated that the taint is purged. Courts weigh: (a) the temporal proximity between the illegality and discovery; (b) the presence of intervening circumstances (e.g., discovering an outstanding valid arrest warrant during an unlawful stop, Strieff); and (c) the purpose and flagrancy of official misconduct.
4. Leon Good Faith Exception: As explained above, evidence obtained under an invalid search warrant is admissible if executing officers relied in objective good faith on the magistrate's determination.

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Standing & Limits on the Exclusionary Rule

Standing to Challenge a Search

• Personal rights: Passengers who have no property or possessory interest in a car or the items seized cannot challenge a search of the car (Rakas v. Illinois, 1978). Passengers are seized during a traffic stop, however, so they may challenge the legality of the stop itself (Brendlin v. California, 2007).
• Ownership of the item is not enough: A defendant who put his drugs in a companion's purse had no reasonable expectation of privacy in the purse (Rawlings v. Kentucky, 1980).
• Guests and drivers: Overnight guests may challenge searches of their host's home (Minnesota v. Olson, 1990), but people present only briefly for a commercial transaction may not (Minnesota v. Carter, 1998). A driver in otherwise lawful possession of a rental car may have a reasonable expectation of privacy in it even if not listed on the rental agreement (Byrd v. United States, 2018).
• Co-conspirators: Membership in a conspiracy does not give a defendant standing to challenge a search of a co-conspirator's property (United States v. Padilla, 1993).
• Suppression hearing testimony: A defendant's testimony at a suppression hearing to establish standing may not be used against him at trial on the question of guilt (Simmons v. United States, 1968).

More Good-Faith Applications

• Statutes: Officers who reasonably rely on a statute authorizing warrantless administrative searches, later held unconstitutional, act in good faith (Illinois v. Krull, 1987).
• Clerical and database errors: Evidence is not excluded when an arrest rests on a court clerk's error in a warrant database (Arizona v. Evans, 1995) or on an isolated negligent police recordkeeping error; exclusion requires deliberate, reckless, or grossly negligent conduct, or recurring or systemic negligence (Herring v. United States, 2009).
• Binding precedent: A search conducted in objectively reasonable reliance on binding appellate precedent that is later overruled does not require exclusion (Davis v. United States, 2011).

Where the Exclusionary Rule Does Not Apply

Confessions and Witnesses as Fruit

• Illegal arrests: Miranda warnings alone do not break the causal chain between an illegal arrest and a confession; courts consider timing, intervening events, and the flagrancy of the misconduct (Brown v. Illinois, 1975). In Wong Sun v. United States (1963), a suspect who was released and voluntarily returned days later to make a statement was held to have purged the taint.
• Payton violations: When police have probable cause but unlawfully enter a home to arrest, a statement the suspect later makes at the police station is admissible (New York v. Harris, 1990).
• Live witnesses: Courts more readily find attenuation for testimony of a witness discovered through an illegal search, because the witness's willingness to testify is an independent act of free will (United States v. Ceccolini, 1978).