@diddl
I partly didn't get the bit about Duncan putting the mug in the sink.
I mean he could have made Donna a drink & she added the drugs later.
It'll surely hinge on whether she was capable of that?
Perhaps there will be enough doubt?
Also, can it be proved that she was dead before Duncan moved the mug iyswim?
Hmm, will she have been clever enough to make the nurse or doctor or whoever carefully put the pills in question high up on a distant, inaccessible shelf she wouldn't have had the strength to get to, hence Duncan (or someone) must have taken them down?
We know she was (at least to an extent) faking her own pain and weakness in front of gullible Duncan, because we see him make her a sandwich, her refuse it saying she feels terrible, but then, the second he goes out of the house, she sits up and tears into it.
If Jimmy's Love Interest Nurse is a key witness in series seven, she really shouldn't have started talking to him after the funeral and saying she knows what really happened, surely? Let alone then ask him out???
You can just imagine the prosecution ripping holes in her evidence on the grounds of her being Jimmy's girlfriend, therefore biased.
Mind you, Duncan was an awful fool to imagine he could turn himself in without involving Perez, his housemate, co-father, and the first person on the scene, because he phoned him!
Delighted that Rhona is coming back -- maybe it'll be Battle of the Fiscals?