patrick james fredricksen , 30 - who has previous convictions for unlawful sexual activity with a minor and impersonating a firefighter - was stopped on his way to one child 's home in eastern utah .
he had already used the bus 's on-board list of children 's names and addresses to try and abduct a young girl , they added .
fredricksen has now been booked into emery county jail for investigation of theft of a vehicle and attempted child kidnapping .