The position of Lammark's hands when he holds the document that Eleanor has been keeping from him, from the sides to up and down in the next shot.
When Lammark introduces himself to Eleanor in the kitchen, he has his left then immediately right hand on his chest in the next shot.
When Eleanor and Lammark are questioning Dean's mother in her kitchen, 2 rolls of paper towel are at various times during the scene on top of and missing from the stove.
One cannot turn off the communication system and speak at normal volume to the passenger next to them in such a noisy helicopter and being heard.
The electricity is put back on in the building just a few minutes after the explosion when it could still trigger more damage (leaking gas pipes, fire hazard, etc.)
The FBI team identifies the rifle as a XM21 based on ballistic data. The XM21 was an accurized M14 rifle that fires a standard 7.62×51mm NATO round. The round is so ubiquitous that it would be impossible to tell the rifle simply from a projectile. You would need the actual rifle to test forensically against any recovered bullets or fragments. It is all but impossible to determine a type of rifle based on the caliber alone.
It is common misconception that vegetarian or vegan people are necessarily iron-deficient.
In the beginning, a powerful spotlight shines in the middle of the street and moves around while this sound of a helicopter is heard. This is of course a regular "movie" spotlight or the helicopter would have to be very close to the ground to shine this way.
There is obviously no oxygen running through Eleanor's mask as revealing but the fog that she makes breathing in it.
FBI Agent Lammark says "no casings, no brass" these are one and the same. Brass is the common slang term for shell casings. Anyone in law enforcement would know this.
The outside of the Baltimore Maryland pharmacy building has a sign for a Canada Post outlet location.
During the first flyover shot of Baltimore, as the police make their way to the crime scene, a view of VIA Canada station can be seen in full view. Needless to say, VIA Canada stations are not present in Baltimore but are present in Montreal, Quebec, Canada, where the film was shot.
The paramedic should have checked Eleanor's oxygen levels with an oximeter and adjusted the flow of oxygen. Usually "non re-breather" masks (with a small plastic pouch underneath) are used in case of intoxication with fumes, etc.