A source in the Patriarca crime family gave police the names of most of the people involved soon after the heist. Oliva was able to describe both Dussault and Flynn, who were not wearing masks when they entered, because the pillowcase that had been put over her head was threadbare and transparent. According to former
Providence Journal reporter
Wayne Worcester, "Oliva really put them away. Nobody else was forthcoming with any kind of information that was very helpful at all. She really was a hero." Witnesses were closely guarded during the trial, and the courtroom was heavily staffed with armed police. Oliva was a key witness, and she described her protection detail: "They had detectives living with me, in my house, around the house, around the neighborhood. They helped fold baby diapers." Dussault and Danese
turned state's evidence and testified against the other six thieves. The trial lasted for four months and was "the lengthiest, most costly trial in state history", according to
Rhode Island Public Radio. The courtroom became known for outbursts and other drama; Tillinghast's lawyer Paul J. DiMaio stopped inviting him to the courtroom due to his comments, including antagonizing and threatening the prosecutor. The jury deliberated for seven hours, then convicted three of the defendants and acquitted the other three. The difference between the guilty and not guilty results came down to alibis. The prosecution was able to break the alibis of John Ouimette, Byrnes, and Flynn, but struggled to disprove the alibis of Tillinghast, Walter Ouimette, and Tarzian. The six men were brought into the courtroom one at a time to hear their respective verdicts. Ralph Byrnes was found guilty on 13 of 14 counts, including robbery, kidnapping, and possession of burglary tools, but innocent of assault with a pistol. Charles Flynn was found guilty on all counts and sentenced to life in prison, though he was released after about 10 years. John Ouimette was found guilty of conspiracy and being an accessory after the fact and was sentenced to 45 years, with 15 years suspended, although his conviction was overturned 10 years into his sentence. Walter Ouimette was charged with conspiracy and being an accessory before the fact but was acquitted on both counts. Gerald Tillinghast and Jacob Tarzian were likewise found not guilty on all counts. ==Later events==