Again... the guy had already walked away from the building and victim. There was another that comes to check on the lady and a fourth person hurries into the building about a minute later. Only after someone enters the building, do they proceed outside to check on her.

I could understand shutting the door during the attack, but the attacker was leaving by the time the guard moved to shut the door. He was already off to the side, the guard made no attempt to call for help, and other people where coming to the entrance of the building.

Maybe the guy was standing there off camera, but it does look like they just didn't want to be involved more than shutting the door on the lady. Which still doesn't look good.