I came across this website and it seems very useful it has all of the correct interrogation answers which will open up the story if you get them all correct, i'm right at the end of the story now so i'll carry on using my own judgement for the rest of the few cases remaining. But what i'm going to do is start the game again and use this site to get everything correct.

Here is the site if any of you are interested:

http://www.strengthgamer.com/LA_Noire_Interrogations.html

thanks milfer... good post... i will probably use this after i complete it. Its kinda hard sometimes!