The following link leads you to a portal website where you´ll find 1,934 links!
Obviously, this is quite a lot. So, choose carefully which of the links might be promising to help you in the preparation for your role in the debate.
Brand new: In January 2003, the Governor of Illinois - before retiring from his office - pardoned all 167 death row inmates of his state. The speech in which he gave his reasons for doing so is to be found here.