Tradition
St. John Chrysostom
Homilies on the Statues
Homily 17
Of the Commissioners (Hellebichus Commander of the Troops, and Cæsarius Master of the Offices) sent by the Emperor Theodosius for the inquisition of the offenders, on account of the overturning of the Statues.
Source: Homilies on the Statues (New Advent)