In this class, with ASU's Dr. Ken Sweat, we will examine the use of plants and other organisms, such as algae and fungi traditionally grouped with plants, as evidence in criminal investigations. Starting with the wood grain of the ladder left at the Lindbergh residence and continuing into modern genetic techniques, we will review how plant evidence has been in the past and can be expected in the future to help solve crimes, prosecute the guilty, and free the innocent.