During the discussion of the gift of the sweater, when the camera is on Jennifer, her left fingers are under her right arm, but when the camera is on Jonathan, her left fingers are resting on her right arm.
When Jonathan is showing Jennifer the sweater from Irene Day, a hand with long fingernails can be seen touching the tag, but Stefanie's nails are seen as short. Stefanie's left hand also switches from being tucked against her body to resting on her right arm between shots.
It's Max's voice over the intercom from the security gate, but the taxi driver is the one using the speaker phone.
When Jonathan and Jennifer are driving after he's bailed her out of jail, she shows him her right hand, to show the ink from being fingerprinted. When she uses the fingers of her right hand to fluff the hair on the right side of her head, no ink can be seen.
Jennifer and her girlfriend never mention a time to meet for dinner.
Jonathan and Jennifer handle the photos and the telephone at the crime scene, even though they'd have fingerprints on them.