When Laura and Mr. Steele arrive at the office, Mildred's desk is on the right side of the screen, while normally it is in the left side. When Laura comes out of Steele's office, the desk is back in its correct spot.
When Steele and Holt confront Keever at his car and show him a photo taken in the park earlier, because of the strong lighting, the image is visible even when seen from behind, and it does not match the photo show from the front. From the back, the person in the middle has their arms spread wide, from the front, he does not.