Thanks for responding Denis. I have no reason to doubt him but never heard of a Police cruiser leading the way. I was wondering if this is in any film or photograph.
Right, now I know what you mean.
Just found this for you Joe:
Motorcade vehicles and personnel
The lead car, an unmarked white Ford:
Dallas Police Chief Jesse Curry (Driver)
Secret Service Agent Winston Lawson (right front)
Dallas County Sheriff Bill Decker (left rear)
Agent Forrest Sorrels (right rear)
Presidential limousine, a 1961 Lincoln Continental code named SS-100-X:
Driver Agent William Greer (Driver)
Advance Agent and SAIC Roy Kellerman (right front),
Nellie Connally (left middle)
Governor John Connally (right middle)
First Lady Jacqueline Kennedy (left rear)
President John F. Kennedy (right rear)
Presidential follow-up car, a convertible code named “Halfback”:
Driver Agent Sam Kinney (driver)
ATSAIC Emory Roberts (right front)
Agent Clint Hill (left front running board)
Agent Bill McIntyre (left rear running board)
Agent Jack Ready (right front running board)
Agent Paul Landis (right rear running board)
Presidential aide Kenneth O'Donnell (left middle)
Presidential aide David Powers (right middle)
Driver Agent George Hickey (left rear)
Agent Glen Bennett (right rear)
Vice Presidential limousine, a convertible:
Policeman Hurchel Jacks (Driver)
Agent Rufus Youngblood (Front Passenger)
Senator Ralph Yarborough (Left rear)
Second Lady Lady Bird Johnson (Middle Rear)
Vice-President Lyndon B. Johnson (Right Rear)
Vice Presidential follow-up car, a hardtop code named “Varsity":
A Texas state policeman (driver)
Vice Presidential aide Cliff Carter (front middle)
Agent Jerry Kivett (right front),
Agent Woody Taylor (left rear)
Agent Lem Johns (right rear)
Press pool car, (on loan from the telephone company):[14]
Telephone company employee (driver)
Malcolm Kilduff, White House assistant press secretary (right front)
For this trip, Kilduff was substituting for Pierre Salinger, who was traveling to Japan with several cabinet officers, including Secretary of State Dean Rusk.[15][16]
Merriman Smith, UPI (middle front)[14]
Jack Bell, AP (left rear)[17]
Robert Baskin, The Dallas Morning News (middle rear)
Bob Clark, ABC (right rear)
Press Car:
Bob Jackson, The Dallas Times Herald
Tom Dillard, The Dallas Morning News
Mal Couch, WFAA-TV
Abbreviations used above include:
SAIC - Special Agent in Charge
ATSAIC - Assistant to the Special Agent in Charge (shift leader)
Driver Agent - Secret Service driver agents operated through their own command chain. Driver agents were typically recruited from the uniformed White House Police Force.[18]
