Whether the Fourth Amendment permits police conducting a valid inventory of an impounded vehicle to open a closed backpack and containers within it.
Holding
Yes. Police may open closed containers during an inventory search when they act under standardized, good-faith procedures that authorize such an inspection.
Reasoning
Inventory searches are a recognized exception to the Fourth Amendment's usual warrant requirement. They are justified not by probable cause or a criminal-investigative purpose, but by routine community-caretaking functions: protecting property in police custody, guarding police against later claims of loss or theft, and identifying dangerous items.
The Colorado Supreme Court wrongly relied on United States v. Chadwick and Arkansas v. Sanders, because those cases involved searches undertaken solely to investigate crime. An inventory search is assessed for reasonableness under its distinct caretaking rationale, so it need not rest on a warrant or probable cause.
The interests supporting the inventories upheld in South Dakota v. Opperman and Illinois v. Lafayette were present here. Once police assumed custody of Bertine's van and its contents, a detailed inventory helped safeguard his property, document the property for claims purposes, and reveal possible hazards to police or others.
The trial court found that Boulder procedures required officers to make a detailed inventory, including opening containers and listing their contents. There was no showing that the officers acted in bad faith or used the inventory as a pretext for a criminal investigation. That standardized, good-faith character made the search reasonable.
The Court rejected a container-by-container balancing rule. Requiring officers in the field to decide whether each item presents enough risk or value to justify opening it would create impractical and uncertain distinctions. A single, familiar standard governing the scope of an authorized inventory better serves both effective policing and Fourth Amendment limits.