He then drove around the corner to John's Barber Shop and used a shotgun to kill two customers, Harry Montgomery, 68, and Michael Ransear, 57, a retired correction officer.

WSJ: Competing versions emerge of NY man who killed 4

He then drove to John's Barber Shop around the corner and used a shotgun to kill two customers, D'Amico said, identifying them as Harry Montgomery, 68, and Michael Ransear, 57, a retired corrections officer.

WSJ: Rampage kills 4, shatters peace in 2 NY villages

John Taylor, 48, and Steve Barber, 47, also perished.

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Mr Barber's father, 88-year-old father John, known locally as Towers, retired from the business three years ago.

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Key players, I'm told, were the Telegraph's Lord Black who is the key fix-it man for the industry, Associated Newspapers' Peter Wright, who is the former editor of the Mail on Sunday, the editor of the Times John Witherow and the editor of the FT Lionel Barber.

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Seven people have been charged in relation to the operation, including former News International chief executive Rebekah Brooks, Sun chief reporter John Kay and Ministry of Defence employee Bettina Jordan-Barber.

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U.S. District Judge John Roll can be seen on the video putting his arms over Giffords staffer Ron Barber and attempting to push him down and crawl under the table with him, Kastigar said.

CNN: STORY HIGHLIGHTS