Truck driver Rodney Grisham, 37, was reported as a suspicious person in the park exhibiting some unusual behavior towards young children. He allegedly tried to grab a two-year-old while wearing sunglasses containing a hidden video camera.
Prosecutors believe he was taking videos of children throughout the park.
According to Mason City Prosecutor Bethany Bennett, he had non-prescribed prescription drugs in his vehicle, as well as items suggesting he was ready for an abduction, including three guns, children's toys and a taser.
During a pre-trial hearing on Thursday, it was revealed that Grisham also had 4,000 rounds of ammunition in his truck.
A judge previously denied his request to reduce his $200,000 bond on Monday, citing 'serious' circumstances surrounding the case.
He has been charged with one count of felony drug possession.
FOX19 asked a Kings Island spokesperson to comment on security practices and policies in the wake of Grisham's arrest. They referred all questions to the Mason Police Department.