"I don't think you're going to be able to find technology to track someone with a specific identity, but there's plenty of technology to track different types of substances and information around here. What exactly are you planning on trying to detect and follow? There are also GPS trackers, which can tack onto clothing or vehicles so next time you have a run in, you could literally just follow them back to their hideout if you let them escape."

Otherwise finding some way to track residual magic or, in this case, areas of Fayren that seem to lack magic usage in an outstanding way.

"Be careful about using magic to find them though. You don't want to accidentally make them into martyrs for their cause if you use magic to hunt down and suppress them."