Mr Adam said neither the FBI nor "a single witness" could identify the man in the tape as Mr Kelly.
He said Mr Kelly had a significant mole on his lower back and that the man on the tape did not have the mole.
He has been on a personal one-man mission to uncover the tape-recordings and transcripts of those intercepts between Arafat and Fatah leader Salah Khalaf, also known as Abu-Iyad, in Beirut and Khalil al-Wazir in Khartoum.
But I want to play one more piece of tape from 1964, because there's a man named Ronald Reagan who defended Barry Goldwater in an ad in 1964.
But the inquiry was thrown off course after the three letters and a tape were sent to the investigation team by a man who was to be nicknamed Wearside Jack due to his strong Sunderland accent.
BBC: NEWS | UK | England | West Yorkshire | Man still held over Ripper hoax
Moghadam says the act of recording a tape is a crucial way of binding and committing the man to the future act.
As an old man, he holes up in a room to listen to tape recordings of Martin Luther King, Jr.
After 25 years, police say they could no longer prosecute the man - dubbed Wearside Jack - who sent letters and a tape to police claiming to be the Yorkshire Ripper.
The tape, which initially aired on the Arabic-language news network Al Jazeera television, shows a man identified as Saeed Alghamdi.
The man was wearing a black Slazenger vest, light brown Pierre Cardin trousers which had black tape linking around two of the belt loops acting as a makeshift belt, and white Lonsdale trainers with a blue trim and velcro fasteners.
BBC: Identity of body found in Thames at Wraysbury a mystery
Leahy finally admits on the tape that his bullet struck the second detainee, but said Hatley fired two more shots that killed the man.
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