The puncture wounds is what throws me. The hammer we see in the video appears to be a sledge hammer, not a claw hammer. That leaves the prybar or a tool we don't see or recognize from the video. I used both hammers and prybar for years professionally. I've also installed and replaced door handles. As soon as I saw the portion of the video where the suspect tries and fails to open one of the doors with the tools, I reached two instant conclusions..
1- this person is clueless with these tools. If I saw someone on a job site use them in such an ungainly fashion my first thought would be that they are going to hurt themselves.
2- what kind of idiot tries to open a locked door by wedding a prybar into a door jam and tapping it with a sledge hammer? The extended bolt is the mechanism keeping the door shut and anyone with even a rudimentary understanding of door locks knows you have to somehow retract the bolt or use enough force to break/warp the door jam to open that door. Tapping against it with the tools is the equivalent of trying to hotwire a car with a baloney sandwich, it makes doesn't sense.
In regards to the "pro hit man staging a burglary" theory, why demonstrate that you suck at burglary? The outfit alone screams "newbie criminal." Why stage the buglary at all? Why spend all that time on camera alone in the building, increasing your chances if being caught? Missy fought back. What if she'd exposed the killers face on camera? That is a huge risk to take when all they had to do was jump her outside, grab some of her valuables and run. They would have left far less evidence, exposed themselves to far less risk, and frankly, in my opinion, done a better job of framing the murder as a botched robbery as per that scenerio.