Deliberate mistake: During his autopsy in Saw IV, it is revealed John Kramer was 52 at the time of his death. Kramer's role in this film is the very early stages of his time as Jigsaw, shortly after his cancer diagnosis, which would put him in his early 50's. However, he looks far too old to convincingly be that young (Tobin Bell was in his mid-70's at the time of filming). He even looks older than he did when he was on his deathbed in Saw III.
Jigsaw (2017)
1 deliberate mistake - chronological order
Directed by: Michael Spierig, Peter Spierig
Starring: Tobin Bell, Callum Keith Rennie, Hannah Emily Anderson, Matt Passmore
Plot hole: An order is given for the body of John Kramer to be exhumed. Surely the police would have noticed someone had dug the grave up in the last few hours (days at a push) as Logan had to get Munsen's body into John's casket.
More quotes from Jigsaw
Trivia: Writers Josh Stolberg and Peter Goldfinger were big fans of the original seven films, and spent two years attempting to woo the producers into hiring them. Their passion and dedication is a big part of what got them the job.
More questions & answers from Jigsaw
Answer: Spoilers: As revealed at the end, Halloran is a crooked cop who has a past connection to Edgar. Edgar therefore wanted him there, since he presumably assumed Halloran could help him out of this jam. It's also possible that Edgar's tape instructed him to find Halloran, but we can't know this for certain, since it wasn't on-screen.
TedStixon