Revealing mistake: In Garabedien's office, supposedly in Boston, the top shelves are full of the Dominion Law Reports, all Canadian legal cases, with the Canadian publisher's name prominently displayed. Below that is long shelf of environmental law reports, an odd thing in a criminal lawyer's office.
Factual error: During the meeting with Baron after identifying the 87 priests, a copy of "Blockbusters and Trade Wars" can be seen over Robbie's shoulder in Baron's office. "Blockbusters and Trade Wars" was published in 2004. (01:11:23)
Continuity mistake: During their business meeting at the restaurant, Robby says that he's more like a "player-coach" to his team. From that point on you can notice (Keaton's hands were in the way before) that his glass is on the towel in one camera angle and in between his towel and Baron's in the other, switching each time the angles alternate. (00:06:30)
Continuity mistake: Commenting the lucky putt, Michael Keaton says "I actually had my eyes closed." Rachel McAdams has her hands joined, which become a rather unnatural crossed wrists pose in the next shot. Similar mistake a moment later; cut and her hand from her lap is in writing position on the desk. (00:17:15)
Factual error: The 2001 story starts in July but there is a scene in church that has the word Pentecost in it. Pentecost Sunday in 2001 was June 3. (00:27:00)
Other mistake: When Rezendes is interviewing abuse victim Patrick in Mitchell Garabedian's office, the books on the lower shelf behind Patrick contain reported court cases from California, New York and the Southern Reporter (covering Florida, Alabama, Mississippi and Louisiana). But the events are unfolding in Boston, Massachusetts. No small law office in Boston would have these volumes in the library, because the cases in them would have no precedent or relevance for Massachusetts law and cases.
Factual error: Cardinal Law is shown in a business suit with a conspicuous pectoral cross. Catholic bishops wear the cross "out" only for religious ceremonies with full vestments. Day to day the cross is in an inside breast pocket with only the gold chain showing.
Factual error: When a priest is speaking from a pulpit in church there is a sign board behind him indicating the hymns to be sung on Pentecost Sunday. The priest is wearing a green chasuble. On Pentecost Sunday he would be wearing a red chasuble.