sad story, sam and lou had a falling out about biz things and sam wanting to kill some guys, they were at odds on things but not to the point of violence ..after paul and tommy were killed .toto was taken down sam made captain, then frank dies ,sam gets upped .big lou just gets made , sam has lou v. become captain instead of lou m.more fall out a very bad argument..sam goes to john who is happy to see sam kill a great tough guy..sam was afraid of louie m. they knew each other from kids..lou m died for no reason..ahh sammy's reason,hope that helps