When Nick is at the PD and is interviewing Charlie, he sets a folder down on the table and a pen suddenly appears on top of the folder in between shots.
In the PD scene when Stokes is interviewing Charlie (32:25), one of the crew is visible on the left side of the frame wearing brown boots and jeans.
When Nick finds Megan, he moves her head so that her face is toward the camera. Working so closely with law enforcement, he would know not to move any part of the body, especially not the neck, as this can worsen injuries to the spine.