As the AFOSI commander, he was responsible for providing independent professional investigative services to commanders of all U.S. Air Force activities about fraud, counterintelligence and major criminal matters by using a worldwide network of agents stationed at all major Air Force installations and at a variety of special operating locations.

Cappucci assignments included an overseas posting at the Directorate of Special Investigations, U.S. Air Forces Europe (USAFE), where he served as chief of the Counterintelligence Division.

[1] In the late 1960s, Cappucci was commander of the 1005th Special Investigations Group, which gave him access to many individuals in the intelligence community including a close and long-term relationship with former FBI director J. Edgar Hoover.

It became clear to Mrs. Amos, Cappucci obtained inside information about the investigation of the accident from Hoover and how Ms. Kopechne's parents agreed to a settlement with Senator Kennedy to remain silent.

Afterwards, the conversation turned to former President John F. Kennedy's assassination wherein Cappucci told the couple, "it was no wonder LBJ had JFK killed."