So...
police at the scene stage manage Sheila's body in the bedroom and plant the rifle on top of the body, and move it about considerably, they adjust the hem of Sheila's nightdress, and then place the rifle against her crotch, barrel moved against her neck, all supported by reference to crime scene photoghrphs, yet the relatives don't bat an eye lid - they don't think police did anything wrong, because they want to blame Jeremy for doing the very things the police are responsible for doing...