I must confess, if I wasn't the dev of this game and didn't know what to do fully. I wouldn't be able to finish this game as well. So we are on the same page there :D You can run to the starting room whenever he chases you, he leaves the chase and returns to his own patrol area. Also, the gimmick of the game is that you need to check the photos and place the items in the correct places. By the way, if you run you are faster than him but when your stamina depletes, he can catch you. Thank you for giving it a try! That means a lot to me.