DALLAS -- An unemployed oil equipment salesman said yesterday that his late father was one of three men who fired the shots that killed President John F. Kennedy on CIA orders.

Ricky White, 29, said his father, Roscoe White, joined the Dallas Police Department two months before the Nov. 22, 1963, assassination so he could carry out the shooting. He was stationed at the grassy knoll opposite the Texas School Book Depository overlooking the assassination site, White said.

He said he drew his conclusions from a diary of his father's he found after his father died in 1971. He said the diary disappeared after he told the FBI about it in 1988.

CIA spokesman Mark Mansfield denied the claim of CIA involvement. White "was never employed by the CIA or associated in any way with the agency," Mansfield said. "We normally never confirm or deny employment, but these allegations are so outrageous that we felt it was necessary and appropriate to respond."

White said Lee Harvey Oswald was a part of the plot, but did not fire shots. He described Oswald and police officer J.D. Tippit, who died in the assassination aftermath, as "patsies."

The Warren Commission concluded that Oswald, acting alone, fired the shots from the depository that killed Kennedy and wounded John Connally, then Texas's governor. Despite the findings, conspiracy theories have abounded since the assassination.