Grissom leaves the CSI office, and a little while later he receives another miniature. Before that Catherine testifies against a man who was arrested for killing his mother. Unable to fine enough evidence to prove him guilty, she goes back into a case from 3 years back, in which the mother and daughter die in the same way. After finding enough evidence she puts the real killer in jail, and a wrongfully convicted man is set free. This episode could reveal even more to the miniature killer... The Real one. Most likely an insider. Dr. Gilbert Grissom receives one more miniature, in which once again the CSI team will try to stop the real killer. Grissom takes a sabbatical and leaves the team.