In 1970 there was a series of criminal prosecutions in New Haven, Connecticut against various members of the Black Panther Party.  The charges ranged from criminal conspiracy to felony murder. All indictments stemmed from the murder of 19-year-old Alex Rackley in the early hours of May 21, 1969. The trials became a rallying-point for the American Left, and marked a decline in public support, even among the black community, for the Black Panther Party.
On May 19, 1969, members of the Black Panther Party kidnapped fellow Panther Alex Rackley, who had fallen under suspicion of informing for the FBI. He was held captive at the New Haven Panther headquarters on Orchard Street, where he was tortured and interrogated for two days until he confessed. His interrogation was tape recorded by the Panthers.  During that time, national party chairman Bobby Seale visited New Haven and spoke on the campus of Yale University for the Yale Black Ensemble Theater Company.  After his speech, Seale briefly stopped by the headquarters where Rackley was being held captive, though it was never proven that he went inside or knew about Rackley's treatment.
Early the next day, three Panthers - Warren Kimbro, Lonnie McLucas, and national Panther "Field Marshal" George Sams, Jr. - drove Rackley to the nearby town of Middlefield, Connecticut. Kimbro shot Rackley once in the head and McLucas shot him once in the chest. They dumped his corpse in the Coginchaug River, where it was discovered the next day.
Police raided the Panther headquarters, eventually arresting nine New Haven area Black Panthers (in addition to two juveniles). McLucas and Sams were captured later.
Sams and Kimbro confessed to the murder, and agreed to testify against McLucas in exchange for a reduction in sentence. Sams also implicated Seale in the killing, telling his interrogators that while visiting the Panther headquarters on the night of his speech, Seale had directly ordered him to murder Rackley. In all, nine defendants were indicted on charges related to the case. In the heated political rhetoric of the day, these defendants were referred to as the "New Haven Nine", a deliberate allusion to other cause-celebre defendants like the " Chicago Seven".
The first trial was that of Lonnie McLucas, the only person who physically took part in the killing who refused to plead guilty. In fact, McLucas had confessed to shooting Rackley, but since some of the charges brought against him made him eligible for the death penalty, a not-guilty plea was the only logical trial strategy.
Jury selection began in May 1970. The case and trial were already a national cause célèbre among critics of the Nixon administration, and especially among those hostile to the actions of the FBI. Under the Bureau's then-secret "Counter-Intelligence Program" ( COINTELPRO), FBI director J. Edgar Hoover had ordered his agents to disrupt, discredit, or otherwise neutralize radical groups like the Panthers. Hostility between groups organizing political dissent and the Bureau was, by the time of the trials, at a fever pitch. Hostility from the left was also directed at the two Panthers cooperating with the prosecutors. Sams in particular, never widely popular in the movement, was accused of being an informant, and lying to implicate Seale to hide his own complicity with the FBI.
Beginning with the pretrial proceedings, tens of thousands of supporters of the Panthers arrived in New Haven individually and in organized groups. They were housed and fed by community organizations and by sympathetic Yale students in their dormitory rooms. The Yale college dining halls provided basic meals for everyone. Protesters met daily en masse on the New Haven Green across the street from the Courthouse (and one hundred yards from Yale's main gate) to hear protest speakers. Among the speakers were Jean Genet, Benjamin Spock, Abbie Hoffman, Jerry Rubin, and John Froines (an assistant professor of chemistry at the University of Oregon). Teach-ins and other events were also held in the colleges themselves.
Towards midnight on May 1, two bombs exploded in Yale's Ingalls Rink, where a concert was being held in conjunction with the protests.  Although the rink was damaged, no one was injured, and no culprit was identified. 
Yale chaplain William Sloane Coffin stated, "All of us conspired to bring on this tragedy by law enforcement agencies by their illegal acts against the Panthers, and the rest of us by our immoral silence in front of these acts," while Yale President Kingman Brewster Jr. issued the statement, "I personally want to say that I'm appalled and ashamed that things should have come to such a pass that I am skeptical of the ability of Black revolutionaries to achieve a fair trial anywhere in the U.S." Brewster's generally sympathetic tone enraged many of the university's older, more conservative alumni, heightening tensions within the school community.
As tensions mounted, Yale officials sought to avoid deeper unrest and to deflect the real possibility of riots or violent student demonstrations. Sam Chauncey has been credited with winning tactical management on behalf of the administration to quell anxiety among law enforcement and New Haven's citizens, while Kurt Schmoke, a future Rhodes Scholar, mayor of Baltimore, MD and Dean of Howard University School of Law, has received kudos as undergraduate spokesman to the faculty during some of the protest's tensest moments. Ralph Dawson, a classmate of Schmoke's, figured prominently as moderator of the Black Student Alliance at Yale (BSAY).
In the end, compromises between the administration and the students quashed the possibility of violence. While Yale (and many other colleges) went "on strike" from May Day until the end of the term, like most schools it was not actually "shut down". Classes were made "voluntarily optional" for the time and students were graded "Pass/Fail" for the work done up to then.
McLucas's trial set new records for the scale of judicial proceedings in Connecticut. It was the first in Connecticut to have metal detectors installed at the courtroom doors; jury selection took six weeks, a Connecticut record, and the jury deliberated for six days, another Connecticut record.  Despite impassioned accusations from protesters that McLucas was being railroaded into the electric chair by a "racist jury,"  the jurors (ten white, two black) acquitted him on the most severe charges, convicting him instead on the sole charge of conspiracy to commit murder. His defense attorney declared, "The judge was fair, the jury was fair, and, in this case, a black revolutionary was given a fair trial."  McLucas was sentenced to twelve to fifteen years in prison. His two collaborators in the murder, who had pleaded to second degree murder, were released after four years.   
In October, 1970, Bobby Seale went on trial alongside Ericka Huggins, founder of the New Haven chapter. This trial was an even larger undertaking, involving a full four months of jury selection. Seale's attorney emphasized that it was only Sams' testimony that tied Seale to Rackley's murder. Huggins's voice was heard on a tape recording of the victim's interrogation, played for the jury. Her lawyer argued that Huggins had been acting under duress.  The jury was unable to reach a verdict, deadlocked 11 to 1 for Seale's acquittal and 10 to 2 for Huggins' acquittal. On May 25, 1971 Judge Harold Mulvey stunned courtroom spectators by dismissing the charges against Huggins and Seale saying, "I find it impossible to believe that an unbiased jury could be selected without superhuman efforts -- efforts which this court, the state and these defendants should not be called upon either to make or to endure". 
Both the Panthers and the FBI suffered damage to their reputations, after the public exposure of their most unsavory activities.
In 1971, a group of left-wing radicals calling themselves the Citizens' Commission to Investigate the FBI burglarized an FBI field office in Media, Pennsylvania, which was found to be spying on Swarthmore College students and faculty. Among the materials stolen in this break-in were documents revealing the nature of the COINTELPRO program. Within the year, Director Hoover declared that the centralized COINTELPRO was over. 
For the Panthers, the Seale trial may have been the height of their national exposure and their popularity among the broader left-wing movement. A string of violent confrontations with law-enforcement, along with the trials and convictions of national party leaders that followed, left the movement spent and adrift, and by the mid-1970s it was largely inactive.
The trial surfaced again in the news in 2000, when former first lady Hillary Clinton ran for U.S. Senate in the state of New York. Anti-Clinton activists discovered that during the trials, Clinton (then a Yale law student named Hillary Rodham) volunteered to monitor the trial for violations of civil rights, for the American Civil Liberties Union. Widely circulated mass e-mails erroneously ascribed to Clinton responsibility for "getting the defendants off," and also blamed the future head of the Clinton U.S. Justice Department's Civil Rights Division, Bill Lann Lee, who was a Yale undergraduate at the time.  Although both were much too junior to have had any role in the actual legal defense, according to John Elvin of the conservative newsmagazine Insight on the News, "Insight reviewed biographies of Hillary Clinton by Milton, [David] Brock and Roger Morris for this story and lengthy selections from such other biographies as Barbara Olson's Hell to Pay. Together, relying on primary and other firsthand sources, they unquestionably back David Horowitz's contention that Hillary was a campus leader during the Panther protests";  Lee apparently played no prominent role in any protests. 
In 2006, Kelly Moye revealed that he was a police informant recruited to infiltrate the Panthers by Nick Pastore, head of New Haven Police's Intelligence Division. George Sams held a gun to Moye's head and demanded he turn over his car. Rackley was driven to his death in Moye's car. The police followed Moye's car as it left toward the murder destination but lost sight of the car prior to the murder.  The State Police discovered Rackley's body the next day. This epilogue was detailed in an article "After 37 Years, Spy Comes In From Cold" by Paul Bass, author of Murder In The Model City: The Black Panthers, Yale and the Redemption of a Killer.
Detective Nick Pastore, who arrested Seale and brought him to New Haven to stand trial, went on to become New Haven's Chief of Police, widely renowned for his successful policy of community policing, and now heads a nonprofit advocacy group in Washington, DC named Criminal Justice Policy. Thirty one years later, when Seale returned to New Haven to speak at the Yale Repertory Theatre, Pastore decided to attend and even presented Seale with a pink porcelain pig and a hug, congratulating him for continuing "the struggle". 
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