"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
We make our own criminals, and their crimes are congruent with the national culture we all share. It has been said that a people get the kind of political leadership they deserve. I think they also get the kinds of crime and criminals they themselves bring into being.