[1][2] Fonzi began his journalism career at the Delaware County Daily Times, before moving to Philadelphia magazine after serving in the army.
According to The New York Times, Fonzi was recruited as an investigator for the HSCA "mainly on the strength of scathing magazine critiques he had written about the Warren Commission and its conclusion that Lee Harvey Oswald had acted alone in killing the president in Dallas on Nov. 22, 1963.
"[3] Gerald Posner wrote: "Fonzi seems an unusual choice for an inquiry that claimed to be impartial, as he was a committed believer in a conspiracy, having written his first article critical of the Warren Commission in 1966.
He obtained testimony from Antonio Veciana that the latter once saw his CIA contact, whom Fonzi established was David Atlee Phillips, conferring with Lee Harvey Oswald.
[3] In 2012, The New York Times said of The Last Investigation that "historians and researchers consider Mr. Fonzi's book among the best of the roughly 600 published on the Kennedy assassination, and credit him with raising doubts about the government’s willingness to share everything it knew.