Great activity to practice with students prior to a test. In the power point the instructions are all outlined and ready to go. I usually make a name sheet with names on it for kids to cancel out who they pick. On a table you have a list of people, items, and where the crime occurred on flash cards. When a student gets it correct they are able to send one person from their group up to flip over a card. I set some rules up to prior. All students must show me a problem before another person does it twice. Once one person gets a correct answer they have 1 minute to show the answer to get a clue. Kids love it.