Answer:
No kerkoulas is not liable
Explanation:
From the passage above, it states that the Patron was " Clumsy", clumsy means doing something or handled something in an awkward manner, it was her lack of carefulness that resulted her to trip, it is not kerkoulas that made her or fall, neither was he beside her that made her to fall, also it was not the presence of the pagan gang members that made her to fall.
So it was not kerkoulas or the gang members that made her to fall, but her clumsiness and lack of concentration that resulted to the trip.