While trying to rescue Macey, Ron is running in the building and his right arm is outside of his jacket. In the subsequent shot, he has both arms in the jacket.
The envelope shown near the beginning has two errors- the ZIP code of 71258 is non existent, which is understandable for a film. However, the base ZIP code of 712 is for northern Louisiana, not Missouri as the envelope was addressed. Secondly, the envelope was sent to a PO box yet it arrived at a residence. PO box items must be picked up at the post office.
The detective supervisor tells Victoria that the earring found in the lab would not be admissible. While she did illegally enter the facility initially, when she was in the area where the earring was found, she was there with the consent of the tenant. Since it was in plain view and possibly stolen, it would be admissible in court.
The detective lives in Washington, Missouri according to the envelope she receives near the beginning. She works for the Cascade police department, which is clearly in Washington state over 2,000 kilometers away since her police car has Washington license plates.
Gun thugs kidnap two girls, ganking one, but do not bother to search their room for incriminating evidence, such as the camera with photos of the professor and his lab. Additionally, they leave Macey's cell phone on while it is at the lab.
While rescuing Macey, Victoria has the evil genius at gunpoint. He is several meters away from her on the other side of a stretcher holding a scalpel. In the subsequent scene, he now has Victoria's gun. She apparently stood still and did not fire her gun while he came around the stretcher and disarmed her.