Foley wrote a 2012 book about his investigations of Bulger entitled, "Most Wanted: Pursuing Whitey Bulger, the Murderous Mob Chief the FBI Secretly Protected."
Brennan questioned Foley about the extent of corruption within the FBI's Boston office, and suggested that the protection of Bulger extended to the U.S. attorney's office in Boston. Brennan repeatedly asked Foley if he had raised "issues" with the prosecutor's office.
"It was actually how they were handling the FBI's informant program, meaning particularly how they were dealing with Bulger and Flemmi while we were trying to investigate them," Foley said, in response to a question from Wyshak.
Foley's testimony came after another retired state police officer, Lt. Robert Long, identified Bulger on several surveillance videos from 1980. The videos showed Bulger meeting with members of his gang, as well as members of the Italian Mafia.
In opening statements to the jury Wednesday, prosecutor Brian Kelly said Bulger made millions through drugs, extortion and loan-sharking by instilling fear in drug dealers, bookies and others. Kelly said Bulger was a long-time FBI informant who provided information on the New England Mafia, his gang's rivals.
Carney, Bulger's lead attorney, agreed with the prosecutor's description of how Bulger made his money, but insisted he was never an FBI informant and denied that he killed two 26-year-old women he is accused of strangling or businessmen in Florida and Oklahoma.
Two bookmakers are expected to testify Friday about how Bulger allegedly extorted fees from them so they could continue to operate illegal gambling rackets.