Then after early experience of killing comes home to take the affections of Laurie Foster who is underage.. clue being in the verse that says "he dug her grave four feet long.. he dug it three feet deep"

How is that a clue that she's underage? If she's buried with her knees tucked to her chest, four feet long would be PLENTY long enough. If the grave is only dug three feet deep, the digger is saving digging time or effort, or both, and cramming the body in a smallish hole makes sense.

Dave Oesterreich