Abstract: Systems and methods for using a scent elimination device to conceal contraband and then training service animals to determine if an ozone-based scent-removal technique has been used to remove scent from contraband are disclosed. The systems and methods comprise providing a plurality of packages. At least one of the plurality of packages containing a predetermined amount of a contraband substance. Further, the systems and methods comprise generating a gaseous stream of descenting material from a portable device. The gaseous stream of descenting material contains ozone. Further, the systems and methods comprise dispersing the gaseous stream of descenting material over the contraband in a concentration sufficient to eliminate the scent. The descented contraband may be placed in an enclosure for transport. Further, the systems and methods comprise introducing a service animal to the plurality of packages.