Arizona v. Youngblood
Supreme Court of the United States
Argued October 11, 1988 Decided November 29, 1988
Full case name	Arizona, Petitioner v. Larry Youngblood
Citations	488 U.S. 51 (more) 109 S. Ct. 333; 102 L. Ed. 2d 281; 1988 U.S. LEXIS 5404; 57 U.S.L.W. 4013
Case history
Prior	Cert. to the Arizona Court of Appeals
Holding
Unless a criminal defendant can show bad faith on the part of the police, failure to preserve potentially useful evidence does not constitute a denial of due process of law.
Court membership
Chief Justice William Rehnquist Associate Justices William J. Brennan Jr. · Byron White Thurgood Marshall · Harry Blackmun John P. Stevens · Sandra Day O'Connor Antonin Scalia · Anthony Kennedy
Case opinions
Majority	Rehnquist, joined by White, O'Connor, Scalia, Kennedy
Concurrence	Stevens
Dissent	Blackmun, joined by Brennan, Marshall
Laws applied
U.S. Const. amend. XIV

Arizona v. Youngblood, 488 U.S. 51 (1988), is a United States Supreme Court case concerning the limits of Constitutional due process in criminal law.

A boy was molested and sodomized. The rape kit was preserved in a refrigerator, but the boy's clothes (containing samples of the assailant's semen) were not preserved in a refrigeration unit. At a later date, criminalists were unable to do testing on the clothing because it had deteriorated as a result of not being refrigerated. The boy picked the defendant out of a photo lineup as his assailant.

Next, the case developed as follows:

At trial, expert witnesses testified that respondent might have been completely exonerated by timely performance of tests on properly preserved semen samples. Respondent was convicted of child molestation, sexual assault, and kidnaping in an Arizona state court. The Arizona Court of Appeals reversed the conviction on the ground that the State had breached a constitutional duty to preserve the semen samples from the victim's body and clothing.

— Arizona v. Youngblood, 488 U.S. 51, 51 (1988).

The defendant claimed that the state disposed of potentially exculpatory evidence by not properly preserving the evidence.

The Supreme Court held that there was no constitutional violation in this case. In the Court's holding, it stated: “[w]e therefore hold that unless a criminal defendant can show bad faith on the part of the police, failure to preserve potentially useful evidence does not constitute a denial of due process of law.”^[1] The Court relied on United States v. Marion, 404 U.S. 307 (1971), United States v. Lovasco, 431 U.S. 783 (1977), and other cases for its reasoning.

On remand to the Arizona Court of Appeals, the court again reversed on state law grounds.^[2]

In 2000, on request from Youngblood's attorneys, the police department tested the degraded evidence using new, sophisticated DNA technology. Those results exonerated Youngblood, and he was released from prison in August 2000, and charges were dismissed.^[3]

Shortly thereafter, the DNA profile from the evidence was entered into the national convicted offender databases. In early 2001, officials got a hit, matching the profile of Walter Cruise, who was then serving time in Texas on unrelated charges. In August 2002, Cruise was convicted of the crime and sentenced to twenty-four years in prison.^[4]

• Miranda v. Arizona (1966)
• Due Process Clause
• List of United States Supreme Court cases, volume 488
• List of United States Supreme Court cases
• Lists of United States Supreme Court cases by volume
• List of United States Supreme Court cases by the Rehnquist Court

• Text of Arizona v. Youngblood, 488 U.S. 51 (1988) is available from: Google Scholar Justia Library of Congress Oyez (oral argument audio)