Since his arrest one year ago today, James “Whitey” Bulger has been winding his way through the judicial system, seeing many familiar faces along the way as he prepares for his long-awaited trial.

But he has at least one significant encounter remaining: When he goes to trial, possibly this fall, he will probably come face to face with his longtime partner, Stephen “The Rifleman” Flemmi, who avoided a death sentence by pleading guilty to some of the killings on the pair’s long list of alleged murders and agreeing to testify against him.