"At that point, we went through with the deal," he said.
"We didn't go to him to buy the store. He came to us. It wasn't your regular extortion," Weeks said.
Rakes, who was in the courtroom for Weeks' testimony, later disputed his account and said he was forced to sell his store to Bulger.
"Kevin continues to lie, as usual, because that's what he has to do," he said.
"My liquor store was never for sale — never, never, never."
In addition to the slayings of Halloran and Donahue, Weeks has testified previously that he was present for three other killings committed by Bulger.
Bulger, 83, is accused of playing a role in 19 killings while allegedly leading the Winter Hill Gang. He has pleaded not guilty.
Bulger fled Boston in 1994 and was one of the nation's most wanted fugitives until he was captured in Santa Monica, Calif., in 2011.
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