According to the differential response strategy, the priority should be given to Call #1. The reason is that it involves an active shooting situation at the Wolfchase Mall, with two people reported injured and the incident still ongoing. This poses an immediate threat to life and public safety, making it the highest priority.
Calls #2 and #3, while they also require police attention, do not present the same level of urgent danger to individuals or the public as Call #1. Therefore, they would be addressed after the active shooting scenario is dealt with.