## Facts

- Federal agents investigating a marijuana-trafficking operation surveilled Michael Murray, James Carter, and others connected to a South Boston warehouse.
- Agents observed Murray and Carter drive separate vehicles into the warehouse and later leave; agents then saw the warehouse contained a tractor-trailer with a long container.
- Agents followed the departing vehicles, arrested the new drivers, and lawfully seized the vehicles; marijuana was found inside.
- After learning of the marijuana in the vehicles, several agents forcibly entered the warehouse without a warrant and observed numerous burlap-wrapped bales in plain view.
- The agents left without disturbing the bales and later sought a search warrant.
- The warrant application did not disclose the prior warrantless entry and omitted any observations made during that entry.
- After a magistrate issued the warrant, agents reentered the warehouse and seized about 270 bales of marijuana and other evidence, including notebooks indicating destinations.
- Murray and Carter were charged and convicted of conspiracy to possess and distribute illegal drugs after the district court denied their motion to suppress the warehouse evidence.

## Issues

1. Whether the Fourth Amendment requires suppression of evidence first observed during an illegal entry when the same evidence is later seized during a search under a valid warrant allegedly independent of the illegality.
2. What conditions must be shown for a warrant-based search to qualify as a genuinely independent source when officers previously entered the premises unlawfully.

## Decision

- The Supreme Court held that the Fourth Amendment does not require suppression of evidence initially discovered during an illegal entry if it is later seized under a valid warrant that is wholly independent of the initial illegality.
- The Court rejected a rule limiting the independent source doctrine to situations where lawful discovery preceded unlawful discovery; the sequence is not controlling.
- The Court stated a warrant-based search is not genuinely independent if (1) the decision to seek the warrant was prompted by what was seen during the illegal entry, or (2) information from the illegal entry was presented to the magistrate and affected issuance of the warrant.
- Because the record did not establish whether the agents would have sought the warrant absent the illegal entry, the Court remanded for findings on whether the warrant-authorized search was an independent source under the stated test.

## Legal Principles

- Independent source doctrine: evidence initially discovered during an unlawful search may be admitted if later obtained through lawful means untainted by the illegality.
- The exclusionary rule aims to prevent the government from profiting from illegal conduct, but it should not place the government in a worse position than it would have occupied absent the illegality.
- For a warrant to supply an independent source after an illegal entry, the government must show both that (a) the decision to seek the warrant was not prompted by observations from the illegal entry, and (b) the magistrate’s probable-cause determination was not affected by information obtained from the illegal entry.

## Conclusion

The Court allowed use of the independent source doctrine when officers unlawfully observe evidence but later seize it under a valid, genuinely independent warrant, and it remanded for factfinding on whether the warrant decision in this case was untainted by the initial illegal entry.


Murray v. United States, 487 U.S. 533 (1988)