Perhaps a curious question...but just how many folks die in Vegas in a normal week...and does that compare to cities of the same size?
It’d be a mighty simple act for a guy to bring his wife out to Vegas...to sit at the slots....and then have a guy come by and jab her. The gal dies at the machine and the medical folks proclaim this a simple heart attack. The guy goes home and collects on her insurance policy...buries the wife...and buys a new pontoon boat.
I don’t know where to go to check those kind of stats.
But your hypothetical sounds like a great plot for a CSI episode.