This is quite a large spoiler for Series 4, so it will be tagged.
spoiler
Did Shaun kill Simone?
It seems oddly coincidental that she died just in time to take part in the experiment. Suspiciously so.
Does anyone else think The Bad Place had a hand in her death, or is just me?
No, not really.
We already know that time in the afterlife is not linear or directly correllated to Earth time, so Shaun could have just picked her up when she eventually died, and moved her back.
With Jearimy Bearimy being what it is, everyone who has ever died might already be in the afterlife, everything is just linearised to not cause our heads to explode. It’s just a matter of moving them.