If I send this to a family member after their done playing it can they send it to me and be replayed from different group with the same set of game?

The short answer is yes! However make sure they are careful to put the right evidence back into the right envelopes. Otherwise it could lead to confusion/your not being able to solve the case. I hope you enjoy the case.

Are there different cases in this and if so how many different ones?

In this game, it is just ONE case you are solving. But there are different phases with new clues to solve the game. So once you solve the whole game, you can't really play again because you already know the answers. BUT it IS well worth it! I recommend it.

I'm trying to find a true crime mystery game, is this one easy? what would you recommend? I'd like longer game play and something challenging.

This game is very predictable and easy. It is fun , and the actual puzzles or analysis are challenging in detail orientation. Game play took around an hour and 20 minutes to finish

How to repackage a cold case after use?

We were very careful to return each item to it's original envelope and to reassemble the suspect portfolios back to their original condition. (Forms and photos paper clipped together.) Unfortunately there are no alternate endings to each cold case. You can either try to sell it or give it to a friend so they can play.