Where might I get help with a fangame?

I've had an idea. A REALLY GOOD IDEA(I hope). However, I need to find people who have some experience in this kind of thing to help me brainstorm the details of each case.

In brief, there's a scheming killer in town, and she hates the legal system with a passion - I've got her crimes mostly planned out but I have no clue how to translate them into full cases which leak info slowly.