BOSTON — Prosecutors say they are not required to provide the name of the informant who gave information about former Bulger associates.

BOSTON — An appellate court ruled that it found no reason to disturb the sentence Catherine Greig received after she pleaded guilty to conspiracy to harbor a fugitive and other charges.

BOSTON — Prosecutors said conducting background checks will minimize the possibility of a mistrial.

BOSTON — The new judge presiding over Bulger’s case has granted prosecutors’ motion to bar the reputed mobster from arguing immunity at trial.

BOSTON — Bulger’s lawyers had hoped to use the informant to challenge the testimony of Kevin Weeks, a former Bulger associate who is expected to be a star prosecution witness against Bulger.

BOSTON — Prosecutors say the immunity claim of reputed Boston gangster James “Whitey” Bulger is “absurd.”

BOSTON — The defense argued that the court can’t invalidate the agreement because it has no legal basis to review a federal prosecutor’s decision not to prosecute someone.

BOSTON — Bulger’s lawyers want the new trial judge to overturn a ruling barring Bulger from using his claim of immunity as a defense.

BOSTON — A federal appeals court removed Judge Richard Stearns, ruling that his background as a federal prosecutor could create the appearance of bias.

BOSTON — In a significant victory for the defense, the court said Judge Richard Stearns’ background as a former federal prosecutor could create the appearance of bias.

BOSTON — James “Whitey” Bulger cannot present evidence to a jury about his claim that he was given immunity for future crimes.

BOSTON — A claim by a lawyer for gangster James “Whitey” Bulger that his client was never an FBI informant is a tactic to influence jurors in the upcoming murder trial, federal prosecutors charged in court documents filed Friday.

BOSTON — It’s the latest of at least three trips to the hospital since the 83-year-old reputed mobster was captured in 2011.

BOSTON — Ahead of his June trial, two Boston Globe reporters have a new biography of James “Whitey” Bulger. We speak with the authors.

BOSTON — When asked what his basis would be for the existence of an immunity agreement if Bulger was not an informant, Carney said they would present the answer when the trial starts in June.

BOSTON — Attorney J.W. Carney said the accused former Boston mob boss was still granted immunity by a U.S. attorney.

BOSTON — James “Whitey” Bulger’s defense team is seeking to have Judge Richard Stearns removed.

BOSTON — James “Whitey” Bulger’s defense is seeking to have Judge Richard Stearns removed.

BOSTON — James “Whitey” Bulger’s lawyers have twice asked U.S. District Judge Richard Stearns to recuse himself.

BOSTON — Attorney J.W. Carney argues that the decision by Judge Richard Stearns to remain on the case threatens the integrity of the process.