Can police informants legally retrieve evidence from a defendant's home? State v. McArthur Explained

In State v. McArthur, the Utah Court of Appeals addressed whether a police informant’s retrieval of stolen items from a defendant’s home violated the Fourth Amendment. The case provides important guidance on the scope of consent searches conducted by undercover agents.

Background and Facts

After a Salt Lake County home was burglarized, police arrested Aimee Rolfe for forging stolen checks. Rolfe agreed to cooperate and told Deputy Delahunty that her former boyfriend, McArthur, had committed the burglary. Rolfe had lived with McArthur intermittently over ten years and still had belongings at his home. She offered to retrieve stolen items she had seen there, including a combat knife and crystal ashtray. Delahunty drove her to McArthur’s residence, where she entered and retrieved the items, which were later used to obtain a search warrant for McArthur’s home.

Key Legal Issues

McArthur argued that Rolfe was acting as a police agent when she entered his home, making her actions an illegal search under the Fourth Amendment. He also challenged the sufficiency of the search warrant affidavit, claiming it omitted material information about Rolfe’s credibility.

Court’s Analysis and Holding

The court applied the principle from Hoffa v. United States that the Fourth Amendment does not protect against “misplaced belief that a person to whom [one] voluntarily confides his wrongdoing will not reveal it.” Even assuming Rolfe was a police agent, the court found no constitutional violation because she had valid consent to enter McArthur’s home and did not exceed the scope of that permission. The plain view doctrine justified her seizure of the stolen items since she was lawfully present and the items were clearly incriminating. Regarding the search warrant, the court concluded that even with the omitted information about Rolfe’s credibility, the detailed and corroborated information she provided still established probable cause.

Practice Implications

This decision reinforces that defendants cannot claim Fourth Amendment protection when they voluntarily grant access to informants, even if the informant’s true purpose is concealed. Practitioners should focus suppression motions on whether informants exceeded the actual scope of their permission rather than arguing that secret cooperation alone invalidates consent.