Colorado v. Nunez

Background

A Colorado man charged with possession of heroin challenged a search of his home and asked the trial court to order the state to reveal the identity of a confidential informant. He argued the warrant lacked probable cause, and the trial court held a hearing, found a sufficient initial showing that the informant could provide essential information, and ordered disclosure. The State refused and the trial court suppressed most of the seized heroin. The Colorado Supreme Court affirmed the suppression solely because disclosure of the informant’s identity was essential to the defendant’s challenge.

Reasoning

The central question before the Justices was whether the United States Supreme Court should review that state-court judgment. The Court dismissed the case as improvidently granted because the Colorado decision rested on independent and adequate state-law grounds, preventing federal review. In a separate opinion, three Justices explained that federal constitutional law does not require routine disclosure of informants’ identities, though Colorado’s state law permits broader disclosure; they emphasized federal precedents allowing states to protect informers and the limited scope of Fourth Amendment rules about veracity hearings.

Real world impact

Because the Supreme Court declined to review, Colorado’s ruling suppressing the evidence stands and state law controls whether informant identities must be disclosed in similar cases there. The decision does not create a nationwide rule about informant disclosure and leaves open variations among states and future federal cases.

Dissents or concurrances

Justice White (joined by the Chief Justice and Justice O’Connor) agreed on lack of jurisdiction but said federal law would not have required disclosure; Justice Stevens warned against issuing advisory opinions and criticized expanding the Court’s involvement in state litigation.