I would have said that everyone's blood was on June's nightdress too,including that which spattered/sprayed from wounds outwards towards her. Was the nightdress ever tested ?
For June to have walked around,she'd have mustered a hidden strength to which you can't have if you've just got out of bed from being asleep,therefore she'd have been on her feet for a while.
I just know that it wasn't Jeremy who'd shot Sheila.