Continuity mistake: When The Artist is talking on the phone to Detective Mary Kelly, sometimes his long, wavy hair behind the phone is flat and other times fluffy (extending wider than the phone). (00:14:45)
Revealing mistake: The cell bars appear to be about 4" apart, but are much wider to accommodate the width of The Artist's face/head when there's a close-up of him next to the bars. (01:13:50 - 01:15:09)
Factual error: The Artist lit a match and candle in his cell. Both are contraband in prison (especially for someone scheduled to be executed). Matches pose a risk of fire/arson and deliberate burning injury or death to a person. Candle wax can be used to prevent cell and other prison doors from locking, creating an escape risk. Also, The Artist's prison cell appeared to be much bigger than a master bedroom (standard size 14'x16'). Prison cells are around 6'x8' or 7'x12'. (01:17:45)
