Dragging A Dead Body Through The Mud Edit Meaning

1.

When after shitting, the power of the flush leaves many shit trails across the bottom off the bog in the direction of the U-Bend, resembling the trail left in the mud after dragging a body (possibly in a bag) across a muddy field

Nick: I think my detective wife may have solved the bathroom "whodunnit"

James: Really, what evidence did she use to solve such a henious crime?

Nick: Someone left mark's where they had been "Dragging a dead body through the mud"

See shit, skidmark, bog, toilet