McClure v. Thompson
United States Court of Appeals for the Ninth Circuit
323 F.3d 1233 (2003)
Robert McClure (defendant) was arrested for the murder of Carol Jones after his fingerprints were found in her blood; her two children were missing. His attorney, Christopher Mecca, came to believe from McClure's statements that the children might still be alive. McClure told Mecca that "Jesus had saved" the children and drew a map of possible locations, then appeared to nod when Mecca said he planned to anonymously call police with the locations. Mecca's secretary made that call; the children were found, but had been shot and killed. McClure was convicted of all three murders and later sought habeas relief, arguing Mecca's disclosure of the map violated the attorney-client privilege and constituted ineffective assistance of counsel.
Whether an attorney's breach of the duty of confidentiality may constitute deficient performance under the Sixth Amendment.