Shopping centers/malls can be very complicated however; if done thoroughly, it can be made into a very safe environment for all to enjoy.
There are fire systems, alarms, camera systems, security staffs, electrical systems, air conditioning systems, and much more that have to be accounted for. In addition, there is management and maintenence, the many stores that have corporate policies, and of course the patrons. These and many other things all need to be addressed and included in the security plan.
In addition, the security staff has to be properly and continually trained in order to prevent, respond to and resolve any issue that arises.
Relationships and training with local emergency agencies are imminent.