He was trying to initially get the other guards to join him for some sort of coup d'etat against the mall management
I know,a local guy from staines upon thames was shot by his security guard a number of years ago on malapascua at his dive business.
I remember this, Druk1. https://www.theguardian.com/world/2014/apr/21/british-man-killed-in-the-philippines I used to dive in Malapascua, and it is where I met my wife also.
All's well that ends well (sort of). https://www.nbcnews.com/news/world/gunman-takes-hostages-upscale-mall-manila-philippines-n1146706