Factual error: Just after TK gets the gun for Yulaw, who is pretending to be Gabe, she sees the real Gabe out the window. It cuts to him crouching behind a fence, with his dog in front of him. The dog has its back to the camera, and is facing Gabe while sitting down. Here, they dubbed over a sound of a dog growling to make it more suspenseful. But that part is entirely wrong. One, it is Gabe's own dog, who in a previous scene was happy to see Gabe and wagging his tail. He would not be growling at his master in such a manner at this point. The dog is also sitting down in a relaxed posture. If the dog was actually growling at him in such a threatening manor, it would not be sitting down, but standing and head lowered.
Factual error: When Gabe is shooting at Yulaw through vents he first shoots at the opening above the door, then at the spot where Yulaw's hand shoots out. After this, he fires at the vent above the door again, only there are less bullet holes than there should be after the first shots at that area, let alone the two sets of shooting together. Also the hole where Yulaw's hand came down is no longer there.
Factual error: When Gabe is confronted by his fellow officers after they think he went crazy, he gets into a short fight with them. He subdues them handcuffing them together and to a wheelchair. The chains on the handcuffs are much too long as to what they should be. This was done to allow the stunt to be done correctly.