Whitey Bulger and Catherine Greig. Photograph: AP
She does not believe he is guilty of these offenses, Reddington said.
Last year, the courts found Greig guilty of civil contempt for her silence and have already added nine months to her sentence.
Her twin sister Margaret McCusker said her sisters deep distrust of prosecutors kept her from testifying. She said Greig fears agreeing to speak would only lay the groundwork for a perjury trap.
McCusker was convicted of perjury after she admitted telling a grand jury she spoke to her sister four times, not three, in the 1990s while Greig was a fugitive.
Greig, who was voted most likely to succeed in their South Boston high school class, fell for Bulger because he represented the strong father figure she never had, according to her sister. Their own father was an alcoholic. Their younger brother shot himself at age 26, and another sister died from substance abuse, she said.
In the 1980s Greig played the mistress in Bulgers life while another woman named Teresa Stanley was his common-law wife. He originally fled Boston with Stanley in 1995 but she tired of life on the run. Bulger took her home and picked up Greig. Stanley later cooperated with federal authorities.
Tom Donahue, the son of one of Bulgers victims who was gunned down on the Boston waterfront during a mob hit on another man, said he believes Greig will get Bulgers cash one day.
When she gets out of jail, her pension is going to be bigger than any of ours, Tom Donahue said.
Reuters contributed to this report.