John R. Justice Prosecutors and Defenders Incentive Act of 2007

John R. Justice Prosecutors and Defenders Incentive Act of 2007- Amends the Omnibus Crime Control and Safe Streets Act of 1968 to direct the Attorney General to assume the obligation to repay student loans for borrowers who agree to remain employed, for at least three years, as: (1) state or local criminal prosecutors; or (2) state, local, or federal public defenders in criminal cases. Allows a borrower and the Attorney General to enter into an additional loan repayment agreement, after the required three-year period, for a successive period of service which may be less than three years. Limits the amount paid under such program on behalf of any borrower to $10,000 per calendar year and $60,000 total.