This is getting off topic, but at that point in Michaels life, he was so distrsting of everyone, if Fredo would have confessed,not run,etc, I believe Michael still would have killed him.Fredo was weak, and stupid and his boathouse rant"I was stepped over....it aint he way I wanted it" means he will never accept his place under his younger brother. Yeah,sure, he genuinely felt bad at the time, but Fredo guilt would dissapear the minute someone else offered "something in it for me, on myu own." And they would have too.