Great!
Only a few things that seperate it from the real game:
You cannot press the witnesses.
When asked to present evidence, Mario says: OBJECTION! Instead of TAKE THAT!
Also, normally, you have to search for evidence, of course, I prefer not having to look for it... so I think you should add some of these things: Other than that, it very well done... can ya teach me how you did this? XD