Iṃgor followed the events from an observer's perspective, sighing as he suspects Joshua being the masked man. He uses his tracking spell searching for Joshua. In case it doesn't hit he plans to just look with the spell for any person that would match the rough description.
He follows, remaining hidden within the maze of back alleys. All the while he transmits the results of the tracking spell to his familiar, to allow him to follow underground, surprise-attacking from below in order to hold the escapee in place.