School officials say for teachers, their complete history is documented, but not substitutes. The state of Georgia is now looking into getting substitute teachers certified, so their records follow them wherever they go.
Officials say one example of this certification is the JonBenet Ramsey case. John Karr, the man who confessed to her murder, was a substitute teacher once in Alabama, and again in California.
Officials say parents complained about his conduct with children, but he went on to teach in California where he was later arrested on child pornography charges.