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Travis Sherman is the founder of Sherman-Tech.
He, along with his chief executive officer, Selena Drake, had a plan to use the Tome of Doom to release evil ghosts and demons. He also built transmitters all over North America to brainwash people. Shaggy Rogers and Scooby-Doo managed to disable his machine, and he was arrested. (Scooby-Doo! Mystery Mayhem)