[Craggoo]

A player shows his neighbor his cards then finally mucks.

I will always request to see a hand if its pretty clear he showed one of his neighbors his whole cards before he mucked. If that person chimes in at all then i'll tell him what i tell everyone: if you don't want me to see your cards then dont show your neighbors. Its simple, show one show all. I won't ever request to see a hand at showdown if the person doesnt want to show.