Originally Posted by Canada1

The top part of the piston looks like heavy scuffing with the cylinder wall.
This scuffing would not happen after the piston broke at the pin boss.

Engines that have connecting rod failure (or bolt failure)have the piston and half of the rod on one end, and the bottom half of the rod thrashing around.

With a piston pin pulled from the top half of the piston it indicates piston to cylinder wall seizing.

This can happen with any type of engine - if piston becomes too hot and not enough clearance to cylinder walls. Not uncommon with turbocharged deals.