I made a few changes to the ideas and have a rough prototype to play with now.
The object of the game now is to collect the clues to prove that one cat pooped in the sandbox. There are 4 color cats with 3 pieces of paired evidence each. A player must collect a pair of evidence to play it. A player collects 2 green cat paw prints and plays them to be one step closer to proving the green cat pooped in the sandbox.
Each player will have a hand of cards and there is a pile in the middle called the sandbox. On a players turn he can ask a player for a card or he can play a card. Playing a card is how new evidence is laid down. Evidence cards are laid down in pairs.
Some cards include: looking at other player's hands, not having to answer a question, forcing a player to tell the truth, etc. I had a junk card in the deck that just took up space but eliminated it. No one wants to hold a sand card that does nothing.
The hardest part of the design was figuring out a way to get cards from players without having them be stolen right away by another player. If I ask for cards but can't play them right away, then another player can just ask for them and steal them. Right now there is an evidence locker to store your new cards so they are safe from questioning. I will have to see if this works well.
That's all I have for now. A simple card game where you're trying to collect evidence by asking questions. For added flavor in the game, you have to narrate your own actions. "I could tell he was lying, but I took the card anyway."
Play games. Always.
P.S. This is what happens when my wife makes me clean the litter box.