You can just about see the muzzle mark of the thredded end of the barrell on the lower wound. Thus this was a contact shot without the SM.
To make matters worse for your already convoluted argument. You argue the police shot Sheila. Yet they didnt have any SMs. 
Stop being ridiculous, the entry of the bullet made the marks around the lower entry wound, a bullet that was fired with the muzzle of the weapon in near contact with the surface of the skin - you are mistaking what the bullet did, for what you say the muzzle of the rifles barrel did minus its silencer..
Not do I only know police shot Sheila at the time of their entry to the kitchen, there exists an 'officers report' (1612) confirming that there had been such a shooting incident upon police entry to the kitchen - so where does that information fit into your account? I suppose your going to argue that no such shooting incident occurred, well good for you chummy!
Cops did shoot Sheila, and that's the truth, any other version of events surrounding her supposed death downstairs in the kitchen, upstairs with her body on top of the bed, or on the far side of the bed, and thereafter on the bedroom floor, it makes no difference, the cops shot Sheila, they killed her, and they tried to make what they were responsible for look like a suicide...
The first shot to the lower part of Sheila's neck was a near contact shot it was not a contact shot - if it wasn't a contact shot how could the muzzle of the gun make a mark on the surface of the skin as suggested by you?
The end of the silencer on the anshuzt rifle could easily have made the mark on Sheila's neck during the training exercise that senior officers conducted upstairs in the main bedroom when they were tampering with Sheila's body once they moved it from on top of the bed, onto the floor on the left hand side of the bed. They were using the rifle at that stage for gauging purposes, trying to see whether or not it was feasible for them to suggest that she had self-inflicted that solitary wound upon herself! For all you know the muzzle end of the silencer could easily have been presented against that solitary entry wound and that whilst it was in that position, cops realised that the overall length of the weapon with the silencer attached was too long for them to suggest that Sheila had taken her own life using that rifle, because with the muzzle of the silencer in a contact position with the surface of the skin around the lower entry wound they could not get Sheila's fingers to activate the trigger! So, what they did next was reposition the rifle upon Sheila's body, only this time they placed her fingers with the trigger! Of course, a consequence of this was that the muzzle of the weapon was now higher up on Sheila's neck! It was sometime around this activity that an attempt was made by the police to manually activate the trigger mechanism (this was being done under the guise of what cops call, 'informatives', which to ordinary folk means, it was a training exercise). Trouble is, that when they attempted to activate the trigger mechanism, the damn rifle discharged a round which penetrated beneath the chin, went up through the void of her mouth, through the roof of her mouth and lodged in her brain - almost immediately after this fresh blood gushed out of the newly created bullet entry wound which caused the shocked police officers to try to stem the flow of blood from the now additional bullet wound in Sheila's neck, and her body was rolled into the recovery position upon its right side, whilst a frantic effort was made by the police who were present to try to keep Sheila alive!
Now, you can choose to believe what you like, but what I am recounting is the truth as also known by all the police officers who were present inside that bedroom at the time! Sheila did not shoot herself, what with? She didn't have possession of a gun downstairs in the kitchen when she got shot by a cop during a struggle, and when she managed to get upstairs into the main bedroom there was no gun there - the closest gun to the main bedroom was the anshuzt rifle and that was resting against the inside of the box room window!
Do not be lured into thinking what Jeremy wants you to think, it won't work for him, because his sister did not shoot herself (period)!!