In January 1967, sixteen-year-old Melvin Porter was arrested for selling marijuana to an undercover police officer. Four days after his arrest, while in the custody of juvenile authorities, Porter told Officer Wade that respondent John Green had supplied him with the marijuana. Porter stated that Green had called him earlier that month, asked him to sell some stuff or grass, and personally delivered a shopping bag containing twenty-nine baggies of marijuana from which Porter made the sale.
A week later, Porter testified at Green's preliminary hearing. He again identified Green as his supplier, though he now stated that Green had shown him where to pick up the shopping bag hidden in the bushes at Green's parents' house rather than personally delivering it. Green's counsel, the same attorney who later represented him at trial, conducted extensive cross-examination of Porter at the hearing. At the conclusion of the hearing, Green was charged with furnishing marijuana to a minor.
Green's trial took place two months later before a judge sitting without a jury in the Superior Court of San Luis Obispo County. Porter again took the stand as the State's chief witness but proved markedly evasive and uncooperative. He testified that Green had called him and asked him to sell some stuff and that he had obtained twenty-nine baggies of marijuana. Porter claimed he could not remember the events after the phone call because he had taken LSD twenty minutes before Green phoned and the drugs prevented him from distinguishing fact from fantasy.
During Porter's direct examination, the prosecutor read excerpts from his preliminary hearing testimony, which were admitted as substantive evidence under California Evidence Code section 1235. Officer Wade also testified about Porter's earlier statement to him. Porter admitted making both prior statements and insisted he had been telling the truth as he then believed it, but he maintained that his current testimony about his inability to remember was also truthful. Green was convicted.
The California Court of Appeal reversed the conviction, holding that the use of Porter's prior statements violated the Confrontation Clause. The California Supreme Court affirmed. The United States Supreme Court granted certiorari.
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