Question: What organization concluded that the Secret Service was deficient in the performance of its duties during the Kennedy assassination?
About the article "Assassination of John F. Kennedy", section "Criticism of Secret Service".

Candidate passages:
The House Select Committee on Assassinations reported that it investigated "alleged Secret Service complicity in the assassination" and concluded that the Secret Service was not involved.
However, the HSCA declared that "the Secret Service was deficient in the performance of its duties."
Among its findings, the HSCA noted: (1) that President Kennedy had not received adequate protection in Dallas, (2) that the Secret Service possessed information that was not properly analyzed, investigated, or used by the Secret Service in connection with the President's trip to Dallas, and (3) that the Secret Service agents in the motorcade were inadequately prepared to protect the President from a sniper.
The HSCA specifically noted:No actions were taken by the agent in the right front seat of the Presidential limousine [ Roy Kellerman ] to cover the President with his body, although it would have been consistent with Secret Service procedure for him to have done so.
The primary function of the agent was to remain at all times in close proximity to the President in the event of such emergencies.
Some argue that the lack of Secret Service protection occurred because Kennedy himself had asked that the Secret Service make itself discreet during the Dallas visit.
However, Vince Palamara, who interviewed several Secret Service agents assigned to the Kennedy detail, disputes this.
Palamara reports that Secret Service driver Sam Kinney told him that requests—such as removing the bubble top from the limousine in Dallas, not having agents positioned beside the limousine's rear bumper, and reducing the number of Dallas police motorcycle outriders near the limousine's rear bumper—were not made by Kennedy.
In "The Echo from Dealey Plaza", Abraham Bolden—the first African American on the White House Secret Service detail—claimed to have overheard agents say that they would not protect Kennedy from would-be assassins:Kennedy alienated Southerners and conservatives around the country, most of whom were already suspicious of him.
In this, the Secret Service reflected the more backward elements of America.
Many of the agents with whom I worked were products of the South...
I heard some members of the White House detail say that if shots were fired at the president, they'd take no action to protect him.
A few agents vowed that they would quit the Secret Service rather than give up their lives for Kennedy.
Questions regarding the forthrightness of the Secret Service increased in the 1990s when the Assassination Records Review Board—which was created when Congress passed the JFK Records Act—requested access to Secret Service records.
The Review Board was told by the Secret Service that in January 1995, in violation of the JFK Records Act, the Secret Service destroyed protective survey reports that covered JFK's trips from September 24 through November 8, 1963. 
As the Assistant Special Agent in Charge of November 22, 1963, Shift Team #3, Kellerman was riding in the front passenger seat of the presidential limousine.
The driver was Secret Service Agent William Greer.
Like all Secret Service agents assigned to protect the President of the United States, Kellerman was trained to use his own body as a shield, taking a bullet if necessary in the line of duty.
Kellerman testified to the Warren Commission, "I turned around to find out what happened when two additional shots rang out and the President slumped into Mrs. Kennedy's lap and Governor Connally fell to Mrs. Connally's lap.
"Kellerman also testified to the Warren Commission, "I am going to say that I have, from the firecracker report and the two other shots that I know, those were three shots.
But, if President Kennedy had from all reports four wounds, Governor Connally three, there have got to be more than three shots, gentlemen.
"He further testified to the Warren Commission that after he remembered hearing the first audible muzzle blast or mechanically suppressed fired bullet bow shockwave, the assassination then ended in a "flurry of shells" coming into the limousine that reminded him of a jet sonic-boom sound quickness.
The House Select Committee on Assassinations declared in 1979 that "the Secret Service was deficient in the performance of its duties" at the time of the assassination, and that President Kennedy did not receive adequate protection in Dallas.
Regarding the conduct of Secret Service Agent Roy Kellerman, the HSCA noted:No actions were taken by the agent in the right front seat of the Presidential limousine Kellerman to cover the President with his body, although it would have been consistent with Secret Service procedure for him to have done so.
The primary function of the agent was to remain at all times in close proximity to the President in the event of such emergencies. 
On the Kennedy assassination, the HSCA concluded in its 1979 report that: Lee Harvey Oswald fired three shots at Kennedy.
The second and third shots Oswald fired struck the President.
The third shot he fired killed the President.
Scientific acoustical evidence establishes a high probability that at least two gunmen fired at the President.
Other scientific evidence does not preclude the possibility of two gunmen firing at the President.
Scientific evidence negates some specific conspiracy allegations.
The committee believes, on the basis of the evidence available to it, that Kennedy was probably assassinated as a result of a conspiracy.
The committee was unable to identify the other gunmen or the extent of the conspiracy.
* The committee believes, on the basis of the evidence available to it, that the Soviet Government was not involved in the assassination of Kennedy.
* The committee believes, on the basis of the evidence available to it, that the Cuban Government was not involved in the assassination of Kennedy.
* The committee believes, on the basis of the evidence available to it, that anti-Castro Cuban groups, as groups, were not involved in the assassination of Kennedy, but that the available evidence does not preclude the possibility that individual members may have been involved.
* The committee believes, on the basis of the evidence available to it, that the national syndicate of organized crime, as a group, was not involved in the assassination of Kennedy, but that the available evidence does not preclude the possibility that individual members may have been involved.
* The Secret Service, Federal Bureau of Investigation, and Central Intelligence Agency were not involved in the assassination of Kennedy.
Agencies and departments of the U.S. Government performed with varying degrees of competency in the fulfillment of their duties.
President Kennedy did not receive adequate protection.
A thorough and reliable investigation into the responsibility of Lee Harvey Oswald for the assassination was conducted.
The investigation into the possibility of conspiracy in the assassination was inadequate.
The conclusions of the investigations were arrived at in good faith, but presented in a fashion that was too definitive.
The Committee further concluded that it was probable that: four shots were fired the fourth shot came from a second assassin located on the grassy knoll, but missed.
The HSCA concluded the existence and location of this alleged fourth shot based on a Dallas Police Department Dictabelt recording that was later discredited, because it was recorded after the assassination, and therefore invalid.
The HSCA agreed with the single bullet theory, but concluded that it occurred at a time point during the assassination that differed from any of the several time points the Warren Commission theorized it occurred.
The Department of Justice, FBI, CIA, and the Warren Commission were all criticized for not revealing to the Warren Commission information available in 1964, and the Secret Service was deemed deficient in their protection of the President.
The HSCA made several accusations of deficiency against the FBI and CIA.
The accusations encompassed organizational failures, miscommunication, and a desire to keep certain parts of their operations secret.
Furthermore, the Warren Commission expected these agencies to be forthcoming with any information that would aid their investigation.
But the FBI and CIA only saw it as their duty to respond to specific requests for information from the commission.
However, the HSCA found the FBI and CIA were deficient in performing even that limited role. 
Sgt.
Davis, of the Dallas Police Department, believed he had prepared stringent security precautions, in an attempt to prevent demonstrations like those marking the Adlai Stevenson visit from happening again.
The previous month, Stevenson, the United States Ambassador to the United Nations, was assaulted by an anti-UN demonstrator.
But Winston Lawson of the Secret Service, who was in charge of the planning, told the Dallas Police not to assign its usual squad of experienced homicide detectives to follow immediately behind the President's car.
This police protection was routine for both visiting presidents and for motorcades of other visiting dignitaries.
Police Chief Jesse Curry later testified that had his men been in place, they might have been able to stop the assassin before he fired a second shot, because they carried submachine guns and rifles.
An investigation by the House Select Committee on Assassinations (HSCA) in 1979 concluded that "the Secret Service was deficient in the performance of its duties."
The HSCA stated:
That President Kennedy had not received adequate protection in Dallas.
That the Secret Service possessed information that was not properly analyzed, investigated, or used by the Secret Service in connection with the President's trip to Dallas.
That the Secret Service agents in the motorcade were inadequately prepared to protect the President from a sniper.
The HSCA specifically noted:No actions were taken by the agent in the right front seat of the Presidential limousine [ Roy Kellerman ] to cover the President with his body, although it would have been consistent with Secret Service procedure for him to have done so.
The primary function of the agent was to remain at all times in close proximity to the President in the event of such emergencies.
Willis was present in Dealey Plaza during the assassination of Kennedy on November 22, 1963.
Standing near the curb at the corner of Houston and Elm Streets, he took a series of color slides immediately before, during, and after the assassination.
Willis appears in the Zapruder film until frame #206, just prior to Kennedy disappearing from view behind the Stemmons Freeway sign.
During the assassination, Willis snapped a 35mm color slide (the fifth of twenty-seven he captured in Dealey Plaza that day) showing the presidential limousine and its occupants, the United States Secret Service agents' follow-up car and occupants, parade onlookers, and the grassy knoll visible in the background.