Let's consider the significance of the 5:31:14 (bathroom ceiling) photo from the standpoint of the gun first theory and then from the standpoint of the knife first theory.
1. Gun first theory
Sometime in the 44 seconds between the 5:30:30 (sitting) photo and the 5:31:14 (bathroom ceiling) photo, JA shoots TA in the head. However, TA is not dead. In fact, although badly hurt and disoriented, TA starts moving out of the shower in an attempt to escape. JA tries to fire another bullet, but the gun jams. JA panics and accidentally snaps this shot as she backs away from the shower door. She then runs down the hallway to grab a knife. With JA gone, TA staggers toward the sink and somehow lifts himself into a standing position, expirating blood from his sinuses onto the mirror. JA returns with the knife (perhaps reentering the bathroom from the closet door) and stabs and slashes at TA. TA crawls to the end of the hallway before JA finally slashes his throat.
2. Knife first theory.
JA continues to hold the camera in her right hand as she slashes and stabs at TA from the moment of the initial blow in the shower until TA reaches the end of the hallway. JA never leaves the bathroom, and is standing between TA and the sink/mirror, yet somehow TA manages to stagger all the way to the mirror, stand up, expirate on the mirror, and then crawl down the hallway. JA stabs and slashes at TA for all of the 1 minute and 46 seconds before JA finally cuts his throat. Then, after dragging TA's dead body all of the way back into the bathroom, JA decides, inexplicably, to shoot TA in the head.
Question for the knife first theorists: How does TA get to a standing position facing the sink/mirror if JA never leaves the room and stands between TA and the mirror, all the while cutting and slashing at him?