You can't think of any murder where you've questioned the actions of the killer? I wonder how cops ever become suspicious of suspects in the first place.
Jodi Arias had quite the staging, she for some reason drug TAs body back to shower. Why would she do that, what changed by finding in in that position in the shower? She also was able to successfully dispose of many things yet she thought it was a good idea to leave behind a camera that had pictures of her and her crime in action. For some reason she thought because she took the time to delete the pictures and run it through the washing machine, she was good. Why not just take that camera and dispose of it? Much simpler. She also pre planned her trip down to how much gas she would need to get out of Arizona with a "hidden" 3rd has can. Why did she use her credit card to fill all of these? Would've the simpler thing to do be get cash from an atm to pay with?
Martin MacNeil had such a "good" staging that he almost got away with it. He made himself available for the discovery but used his 6year old daughter to do it. It was clear he wanted to make sure people saw the story from his point of view.
IMO almost every case unfolds this way. I used these 2 as examples because they are my most recent follows but I could go on and on.
I would say that what Jodi arias did was an unsuccessful attempt at removing evidence. I wouldn't necessarily call it staging.
I am not familiar with the McNeil case. Can you explain how he staged the scene?