This file is an image of a cut-away view of a tissue sampler; Tissue samplers are the size of a grain of sand; Tissue samplers are spherical in shape with a crater on the top and a deep shaft into the sphere from the center of the crater; The tissue samplers are typically made of steel; The top of the crater is very sharp and can cut into skin; The barbs pointing inward into the shaft are strong and sharp and capable of cutting skin; Tissue samplers are used as part of a personal security invention called ADAIS; ADAIS devices are typically the size and shape of a dime; ADAIS devices typically have a breakable membrane that contains about 100 tissue samplers; The protected person wears the ADAIS device; When the victim is attacked the victim breaks the ADAIS membrane by hand; This puts numerous tissue samplers onto the victim's hands; During the struggle between the victim and attacker tissue samplers are rolled between their skins; As a tissue sampler rolls it rips tiny samples of skin from both the victim and attacker and stuffs them into it's shaft for storage; Barbs in the shaft keep the tissue samples from falling out of the shaft; The white and black ovals in the light gray shaft represent the tissue samples from the attacker and victim; The police find these stuffed tissue samplers; The police use DNA analyze on the tissue samples to identify the victim and attacker and prove the attacker's guilt