CHARLOTTE, N.C. (AP) — An app for the iPod developed by two UNC Charlotte professors and several students helps campus police respond to a mass shooting or other any other tragedy that involves multiple victims.

The app uses digital architectural files to create 3-D maps of every campus building. The maps are loaded in iPod Touches carried on the arms of SWAT team members or other first responders, The Charlotte Observer reports (http://bit.ly/LUgK6X).