There are three types of muscle tissues: skeletal muscle, cardiac muscle and smooth muscle. Skeletal muscle is a tissue that is under the control of the voluntary nervous system and attached to the bones by tendons. In the microscope, striated muscle cells have a stripe-like appearance, it is for that reason that they are called striated. Moreover, both cardiac muscle tissue and smooth muscle tissues are under involuntary control.
I am getting DNA samples from these people because they are prime suspects at the scene (at the exact time and place). Besides, if there is any evidence left over; it should be stored and used for further research.