Sacred Ground, not so sacred method

About panel #5 of the Indian Pipe Series: 
Energy Transfer Partners sped up the digging when they were approaching the Native American burial grounds.  They worked on the weekend under the close watch of armed guards, helicopters, and watchdogs.  Tell me they didn't know they were doing something wrong!  This panel shows a front loader exhuming an ancient Indian body.  The front shovel becomes a coffin in the dark of night.  Made with sand to exemplify the dirty business.