adequate and independent state ground

In March 1992, Alfonso Lopez, Jr., a twelfth-grade student at Edison High School in San Antonio, Texas, arrived at school carrying a concealed .38-caliber handgun and five bullets. Acting on an anonymous tip, school authorities confronted Lopez, who admitted possessing the weapon. Local police arrested him and charged him under Texas law with firearm possession on school premises. The following day, state charges were dismissed after federal agents charged Lopez with violating the Gun-Free School Zones Act of 1990. A federal grand jury indicted him on one count of knowing possession of a firearm at a school zone. Lopez moved to dismiss the indictment, arguing that the statute exceeded Congress's power to legislate control over public schools. The district court denied the motion, concluding that the statute was a constitutional exercise of Congress's power to regulate activities affecting commerce because the business of schools affects interstate commerce. After a bench trial, the court found Lopez guilty and sentenced him to six months' imprisonment and two years of supervised release. Lopez appealed to the Court of Appeals for the Fifth Circuit, which reversed the conviction, holding that the statute was beyond Congress's power under the Commerce Clause. The Supreme Court granted certiorari to review the case.

In the early hours of June 21, 2000, Officer Jeffrey Moritz of the Flagstaff Police responded in uniform to complaints that a pickup truck with loud music blaring was circling a residential block. When he located the truck, the officer turned on the emergency lights and siren of his marked patrol car. This prompted petitioner Eric Clark, the truck’s driver (then 17), to pull over. Officer Moritz got out of the patrol car and told Clark to stay where he was. Less than a minute later, Clark shot the officer. The officer died soon after but not before calling the police dispatcher for help. Clark ran away on foot but was arrested later that day with gunpowder residue on his hands. The gun that killed the officer was found nearby, stuffed into a knit cap. Clark was charged with first-degree murder under Ariz. Rev. Stat. Ann. §13–1105(A)(3) for intentionally or knowingly killing a law enforcement officer in the line of duty. In March 2001, Clark was found incompetent to stand trial and was committed to a state hospital for treatment. Two years later the same trial court found his competence restored and ordered him to be tried. Clark waived his right to a jury, and the case was heard by the court. At trial, Clark did not contest that he shot the officer or that the officer died. He relied on his own undisputed paranoid schizophrenia at the time of the incident to deny that he had the specific intent to shoot an officer or knowledge that he was doing so. The prosecutor offered circumstantial evidence that Clark knew the victim was a police officer. The prosecutor also offered testimony indicating that Clark had previously stated he wanted to shoot police and had lured the victim to the scene to kill him. In presenting the defense case, Clark claimed mental illness. He sought to introduce it for two purposes. First, he raised the affirmative defense of insanity. This put the burden on himself to prove by clear and convincing evidence that at the time of the crime he was afflicted with a mental disease or defect of such severity that he did not know the criminal act was wrong. Second, he aimed to rebut the prosecution’s evidence of the requisite mens rea. Ruling that Clark could not rely on evidence bearing on insanity to dispute the mens rea, the trial court cited the Arizona Supreme Court’s decision in State v. Mott. That decision refused to allow psychiatric testimony to negate specific intent. It held that Arizona does not allow evidence of a mental disorder short of insanity to negate the mens rea element of a crime. As to his insanity, Clark presented lay testimony describing his increasingly bizarre behavior over the year before the shooting. This included testimony that Clark thought Flagstaff was populated with aliens trying to kill him and that bullets were the only way to stop them. A psychiatrist testified that Clark was suffering from paranoid schizophrenia with delusions about aliens when he killed the officer. The psychiatrist concluded that Clark was incapable of luring the officer or understanding right from wrong and was thus insane at the time of the killing. In rebuttal, the State’s psychiatrist gave his opinion that Clark’s paranoid schizophrenia did not keep him from appreciating the wrongfulness of his conduct before and after the shooting. The judge then issued a first-degree murder verdict. The judge found that Clark had not established that his schizophrenia distorted his perception of reality so severely that he did not know his actions were wrong. Clark moved to vacate the judgment and life sentence. He argued that Arizona’s insanity test and its Mott rule each violate due process. The trial court denied the motion. Affirming, the Arizona Court of Appeals held that the State’s insanity scheme was consistent with due process. The court read Mott as barring the trial court’s consideration of evidence of Clark’s mental illness and capacity directly on the element of mens rea. The Supreme Court of Arizona denied further review. The United States Supreme Court granted certiorari.

Respondent Rudy Bladel was a disgruntled former railroad employee. In December 1978 he murdered three Amtrak employees at the Jackson, Michigan station. He was arrested on January 1, 1979. After being questioned on two occasions, he was released on January 3. He was arrested again on March 22, 1979. The next morning Bladel was arraigned. He requested appointment of counsel because he was indigent. The detective in charge of the investigation was present at the arraignment. A notice of appointment was mailed to a law firm that did not receive it until March 27. On March 26 two police officers interviewed Bladel in the county jail. They advised him of his Miranda rights and obtained a confession. Bladel had inquired about his representation several times since the arraignment but had not been told that counsel had been appointed. Respondent Robert Jackson was one of four participants in a plan to kill a man on July 12, 1979. Arrested on July 30 on an unrelated charge, he made six statements to police before his arraignment at 4:30 p.m. on August 1. At the arraignment he requested appointment of counsel while officers involved in the murder investigation were present. The following morning, before he had consulted counsel, two officers obtained a seventh statement from him after again advising him of his Miranda rights. The Michigan Court of Appeals initially affirmed Bladel's conviction but reversed after reconsideration. It affirmed Jackson's murder conviction while setting aside the conspiracy count. The Michigan Supreme Court consolidated the appeals. It held the post-arraignment statements inadmissible and reversed both convictions. The United States Supreme Court granted certiorari in 1985.

On May 31, 1979, Drug Enforcement Agency Agent Robert Williams watched respondent Charles Carney approach a youth in downtown San Diego. The youth accompanied Carney to a Dodge Mini Motor Home parked in a nearby lot. Carney and the youth closed the window shades in the motor home, including one across the front window. Agent Williams had previously received uncorroborated information that the same motor home was used by another person who was exchanging marihuana for sex. Williams, with assistance from other agents, kept the motor home under surveillance for the entire one and one-quarter hours that Carney and the youth remained inside. When the youth left the motor home, the agents followed and stopped him. The youth told the agents that he had received marihuana in return for allowing Carney sexual contacts. At the agents’ request, the youth returned to the motor home and knocked on its door; Carney stepped out. The agents identified themselves as law enforcement officers. Without a warrant or consent, one agent entered the motor home and observed marihuana, plastic bags, and a scale of the kind used in weighing drugs on a table. Agent Williams took Carney into custody and took possession of the motor home. A subsequent search of the motor home at the police station revealed additional marihuana in the cupboards and refrigerator. Respondent was charged with possession of marihuana for sale. At a preliminary hearing, he moved to suppress the evidence discovered in the motor home. The Magistrate denied the motion. Respondent renewed his suppression motion in the Superior Court. The Superior Court also rejected the claim. Respondent then pleaded nolo contendere to the charges against him, and was placed on probation for three years. Respondent appealed from the order placing him on probation. The California Court of Appeal affirmed. The California Supreme Court reversed the conviction. The Supreme Court of the United States granted certiorari.