Allerio was at his place, practicing archery, hitting the bullsye on multiple targets at almost the same time. His magical bow was extraordinary. Subsonic magical arrows, intinite supply, incredible durability, extremely high efficiency. If it had one flaw, it would have been that the arrows, while disappearing 1 minute after hitting the target, still left residual magical energy for quite a while. But the high elf didn't particularly care. He didn't belive such an element would be crucial in determining who the masked vigilante was.
Maddox went back to the lab to look at the evidence at hand. Nothing more than Magic residue from the arrow, something that almost every spell ever left behind. Maddox wasn't a dumbass though. Upon looking at the camera, he saw an arrow fly out and hit the victim. This person was a vigilante, taking street justice into his own hand. The victim had jacked the woman's purse.
He cycled through every weapon that could release that sort of magic arrow. It eliminated every gun and sword weapon. It eliminated any sort of technology. All there was were magic longbows and magic crossbows.
Maddox took a look at the magic residue and duplicated it to test it. Upon pouring other magic residue into it, he saw that in this case, it was Holy Magic residue. It attracted other Holy Magic and reacted strongly to Dark Magic residue. The database eliminated any weapon that wasn't Dark or Holy. So that left Holy and Dark Bows, which were many. No worries though