Hoffa v. United States (1966 Supreme Court ruling) arose from a jury-tampering investigation that turned a government informant’s presence near Jimmy Hoffa into a constitutional question: could Partin’s covert role violate Hoffa’s right to counsel? The U.S. Supreme Court upheld the conviction, but Chief Justice Earl Warren’s dissent condemned the government’s conduct, leaving the case’s legal result in tension with its account of how the evidence was obtained.

The Test Fleet prosecution

The chain began with the Test Fleet case, scheduled for trial on October 22, 1962. Prosecutors alleged that a car-hauling company had been placed in the names of Hoffa’s wife and the late Owen Bert Brennan, and that Hoffa was paid by an employer after settling a strike favorably for it. The activity dated back five years and had already been examined by the McClellan Committee and the U.S. Department of Justice. Prosecutor Charlie Shaffer nevertheless described the company as part of a long-range plan to keep Hoffa paid. The charge itself was a misdemeanor; proof of jury tampering could raise the stakes to a felony.

The Get Hoffa Squad placed Partin, whatever his own motivation, in Hoffa’s entourage in Nashville, where he served as a guard outside Hoffa’s suite at the Andrew Jackson Hotel. Walter Sheridan acknowledged that Partin was given a recording device to capture calls with Hoffa. Sheridan also told him to watch for efforts to bribe jurors. The government later maintained that this assignment concerned an ongoing crime, not the Test Fleet defense, and that Partin had not been planted by prosecutors to gather information about the case.

From jury selection to the Chattanooga trial

During jury selection, an insurance broker told Judge Miller that a neighbor had offered him $10,000 in hundred-dollar bills to vote for acquittal if selected. The prospective juror was excused after the judge required him to name the neighbor. Other prospective jurors said a supposed Nashville Banner reporter named Allen had called to ask their views of Hoffa; there was no reporter by that name at the paper. Those tainted candidates were dismissed. The incidents supplied the prosecution with evidence of attempts to influence the jury, while intensifying the dispute over how investigators had entered Hoffa’s orbit.

The constitutional issue reached the courtroom in the later Chattanooga jury-tampering trial. Partin had been kept out of sight in a cabin on Lookout Mountain, Tennessee. For three months, James Neal called witnesses against Hoffa’s alleged accomplices. Then, on the final day, when the defense appeared close to victory, Partin entered the courtroom as the government’s last witness. Defense lawyers objected that the government had planted a mole in the defense camp and violated Hoffa’s right to counsel; if the testimony were excluded, they argued, Hoffa would win.

The judge heard four hours of argument and accepted the government’s account: Partin had gone to the trial on his own, reported to Sheridan rather than to the prosecutors, and relayed evidence of jury tampering through Sheridan. The judge permitted him to testify. Hoffa glared at Partin, who went on to describe Hoffa’s alleged boasts about attempts to bribe jurors, including efforts he said Hoffa had discussed before or while they were underway. In closing, Neal argued that the government had checked Partin’s claims against events and found them borne out. Lead defense attorney James Haggerty called the case a frame-up and attacked Sheridan as Bobby Kennedy’s instrument, turning the dispute over evidence into a broader political accusation.

The Supreme Court appeal

Hoffa’s appeal presented a novel question: whether Partin’s presence at the Andrew Jackson Hotel had infringed Hoffa’s constitutional right to counsel. The Court considered the case amid the period the book describes as the criminal-law revolution, when courts were recognizing protections that had previously been less developed. Joseph A. Fanelli, a seasoned appellate lawyer new to Hoffa’s team, handled the appeal. After oral argument, Sheridan wrote, the prosecution did not know how the justices would rule.

An effort to influence the outcome added a striking episode to the appeal. A Teamsters official approached the brother of Justice William Brennan, who owned a brewery, and threatened that it would be shut down if Brennan did not vote the right way. The pressure did not produce the desired result: Brennan joined the majority. Justice Potter Stewart wrote the opinion against Hoffa, while Warren dissented and called the government’s clandestine use of Partin “an affront to the quality and fairness of federal law enforcement.” The Court thus rejected Hoffa’s constitutional challenge without erasing the dissent’s objection to the means used to build the case.

Letters, rehearing, and the ruling’s legacy

Nine days after Stewart’s opinion, William Loeb, publisher of the Manchester Union Leader and an old college friend of the justice, wrote to him on Hoffa’s behalf. Loeb relayed an unnamed high official’s allegation that Bobby Kennedy had used illegal wiretaps in pursuing Hoffa. The book notes that Loeb omitted a consequential detail: he had been promised a large loan from the Teamsters pension fund and later received it. Hoffa’s lawyers sought a rehearing, but the account does not describe the letter as changing the Court’s ruling.

A separate episode in 1971 illustrates how Hoffa’s legal and political fortunes continued to intersect, though it was not part of the Court’s holding. Attorney Morris Shenker filed a pardon petition directly with the White House, bypassing the usual route through the Justice Department, prosecutors, the FBI, and the sentencing judges; Attorney General John Mitchell marked it approved. The later petition did not undo the 1966 decision. The ruling’s significance lies instead in the boundary it drew: the Court left the conviction standing despite Hoffa’s challenge to Partin’s presence, while Warren’s dissent preserved a pointed warning about covert government conduct.