DOA Filter
A zombie army would indeed be difficult to hide. Another form of necromancy could yet be the trouble. Given the timing, though, I find it more likely that these accusations have a motive other than genuine desire to prevent the abuse of magic.
Your society sounds much like the one I came from, in that way. Staying ahead of discontent will surely be important. I hope that we will find the root of this problem before it escalates any further. Given the trouble that has already occurred, I do not like to imagine what may happen if magic more powerful or malicious is brought to bear. Nor do I like to imagine what will become of Outlanders in Vallo if those who hate and fear us are successful in turning public sentiment against us.