Since you have nothing to refute the evidence that Sheila didn't even load a gun let alone fired one and that she can't have shot herself then moved herself flat, put the mdoerator away and put the bible in a pool of her blood you have an enromous problem.
You want to skip the physical evidence, skip Julie's testimony and just ASSUME that Sheila did it so you can then advance your anti-adoption agenda.
You are not fooling anyone and just making your self look bad in the process.
If the above is as strong as you claim it is then why did the CCRC refer the case to the CoA in 2002? Why not say:
'ok her DNA might not have been in the silencer but hey SC couldn't load a gun, move herself flat, put the moderator away, and put the bible in a pool of her blood? And, and, and what about JM's testimony and, and, and the physical evidence?'
"Agenda"...what may I ask is yours? A man serving a life sentence, with as far as I am aware no light at the end of the tunnel, and yet you wish to spend copious amounts of time reinforcing the prosecution's position &%+((£
Closed adoptions reached their peak in 1968 and are pretty much non-existent now.