⚡ 10-Second Rule
Evidence the government finds by breaking the rules usually gets tossed — unless a forgiveness doorway lets it back in.
🧒 ELI-10 Scene
Coach Rivera referees the neighborhood soccer league. When Dana scores by slapping the ball in with her hand, Coach cancels the goal. Why? Not to be mean — canceling goals is how you stop hand-slapping. But Coach isn't rigid. If Dana's shot was already rolling across the line before her hand touched it, the goal counts anyway. It was going in no matter what. If Marcus scores fairly on a totally separate play, that goal stands too — Dana's cheating didn't cause it. And if the referee honestly waved "play on" after checking his own rulebook, punishing the team teaches nobody a lesson. Only the player whose goal got stolen can even complain. Courts cancel tainted evidence the same way: to teach the police, not to hand out prizes.
⚖️ Actual Rule
Evidence obtained through an unconstitutional search or seizure is inadmissible in the prosecution's case-in-chief, and the rule applies to the states. Mapp v. Ohio, 367 U.S. 643 (1961). Exclusion extends to derivative evidence — the "fruit of the poisonous tree" — unless the connection between the illegality and the evidence is broken. Wong Sun v. United States, 371 U.S. 471 (1963). Three chain-breakers: (1) independent source — the evidence was in fact obtained through a lawful route genuinely independent of the illegality, Murray v. United States, 487 U.S. 533 (1988); (2) inevitable discovery — the prosecution proves by a preponderance that lawful means would inevitably have uncovered it, Nix v. Williams, 467 U.S. 431 (1984); (3) attenuation — the taint dissipated, weighing temporal proximity, intervening circumstances (such as a valid preexisting arrest warrant), and the purpose and flagrancy of the misconduct, Brown v. Illinois, 422 U.S. 590 (1975); Utah v. Strieff, 579 U.S. 232 (2016). Good-faith exception: exclusion is inappropriate where officers act in objectively reasonable reliance on a facially valid warrant later held invalid, United States v. Leon, 468 U.S. 897 (1984) — but not where the affiant lied or acted recklessly, the magistrate abandoned neutrality, the affidavit was so bare-bones that reliance was unreasonable, or the warrant was facially deficient. Only a defendant whose own Fourth Amendment rights were violated may seek suppression. Rakas v. Illinois, 439 U.S. 128 (1978). Illegally obtained evidence remains available to impeach the defendant's own contrary trial testimony, Walder v. United States, 347 U.S. 62 (1954); United States v. Havens, 446 U.S. 620 (1980), and knock-and-announce violations do not trigger exclusion, Hudson v. Michigan, 547 U.S. 586 (2006).
ELI-10 translation: courts cancel cheated-for evidence to teach police, but the goal still counts if cheating didn't really cause it.
🔍 Ask These Questions
- Was there an actual constitutional violation? (No broken rule means nothing to cancel.)
- Does the defendant have standing — were his rights violated? (Only the player whose own goal was stolen gets to complain.)
- Is the challenged evidence a fruit — found because of the violation? (Follow the chain: did the cheating actually lead police to this thing?)
- Is the chain broken — independent source, inevitable discovery, or attenuation? (Evidence counts if found a clean separate way, if it was coming anyway, or if time and events washed the taint out.)
- Does the good-faith exception apply — objectively reasonable reliance on a facially valid warrant? (If the referee honestly checked his rulebook and said go, canceling teaches nobody.)
- Even if excluded, can it still impeach the defendant's testimony? (A defendant who takes the stand and lies can be caught with the canceled evidence.)
[NJ-VARIANT: flagged for future Eli Explains NJ Law module]
⚠️ Bar Trap
Exam language: Examiners bait automatic suppression the moment any illegality appears. Two gates come first: standing — a defendant cannot suppress evidence found by violating someone else's privacy, such as drugs seized from a friend's apartment — and the good-faith exception, which saves evidence seized in objectively reasonable reliance on a warrant later invalidated.
ELI-10: Broken rule does not always mean canceled evidence. First ask whose privacy was invaded, then ask whether the police honestly trusted a judge's signed note.
🧪 Question
A detective investigating a string of warehouse burglaries submitted a detailed affidavit to a magistrate describing two informants' tips and the detective's own corroborating surveillance of the suspect's storage unit. The magistrate found probable cause and issued a warrant particularly describing the unit and the stolen electronics sought. Executing the warrant, officers found and seized crates of stolen electronics. Before trial, the court concluded that the affidavit, though detailed and submitted in complete candor, fell just short of establishing probable cause because the informants' reliability was inadequately shown. The defendant moves to suppress the electronics.
How should the court rule?
(A) Grant the motion, because a search under a warrant unsupported by probable cause is per se unreasonable. (B) Grant the motion, because the electronics are fruit of the poisonous tree. (C) Deny the motion, because the officers relied in objectively reasonable good faith on a facially valid warrant issued by a neutral magistrate. (D) Deny the motion, because the exclusionary rule applies only in federal prosecutions.
Answer: (C). Under Leon, suppression is unwarranted where officers reasonably rely on a facially valid warrant later held defective; the affidavit was detailed and candid, the magistrate was neutral, and no Leon carve-out — falsehood, rubber-stamping, a bare-bones affidavit, or facial deficiency — applies.
💡 Why the Wrong Answers Are Wrong
- (A) ignores the good-faith exception; the exclusionary rule is a deterrent remedy, not an automatic consequence of every defective warrant.
- (B) misapplies the fruit doctrine, which presupposes suppressible primary illegality; good-faith reliance means exclusion never attaches at all.
- (D) is flatly wrong after Mapp, which applied the exclusionary rule to state prosecutions.
- ELI-10: The misconception is thinking every police mistake cancels the evidence. Canceling exists to teach, and honest trust in a judge's note needs no teaching.
