Remind the groups that everyone has something to offer and they should work with each other. Each person in the group must read at least one crime scene to the rest of the group while doing their detective work. They will hand them in to the teacher. The group with the most correct gets a prize. Teacher will assess objectively the made up crime scene, grammar, and whether or not everone contributed to the writing.
Possibility assess the quality of everyones fingerprint.
Go through their final conclusions on who the criminals were.